著者
Hideaki Goto Yasuhiro Kumahara Shoichiro Uchiyama Yoshiya Iwasa Tomoru Yamanaka Rinako Motoyoshi Shun Takeuchi Sho Murata Takashi Nakata
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Disaster Research (ISSN:18812473)
巻号頁・発行日
vol.14, no.6, pp.894-902, 2019-09-01 (Released:2019-09-01)
参考文献数
12
被引用文献数
6

Record-breaking heavy rainfall in July 2018 caused an extremely large number of slope movements over a broad area of western Japan. We mapped the distribution of slope movements in the southern part of Hiroshima Prefecture through an interpretation of aerial photographs that were acquired after the rainfall by the Geospatial Information Authority of Japan, and counted a total of 8,497 slope-movement starting points. The widespread distribution of slope movements – from Etajima City of Hiroshima Prefecture to Kasaoka City of Okayama Prefecture – suggests that the heavy rain affected a very large area. The starting points of debris flow during this disaster were commonly close to the crest of mountain ranges. We compared the distribution of slope movements to the 24-hr rainfall accumulation during the heaviest rainfall event to clarify the factors that caused regional difference in slope-movement distribution. We found the area of highest density of the slope movements was consistent with the area receiving a cumulative rainfall of >250 mm. This observation indicated that the position of slope-movement starting points was not related to differences in geology.
著者
Yuichi Kurita Takumi Okumura Ryota Imai Tomohiko Nishigami So Tanaka Takanori Taniguchi
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Robotics and Mechatronics (ISSN:09153942)
巻号頁・発行日
vol.35, no.3, pp.612-621, 2023-06-20 (Released:2023-06-20)
参考文献数
31

Total knee arthroplasty (TKA) is the primary treatment for knee osteoarthritis. However, TKA is highly likely to result in prolonged chronic postoperative pain. The one-foot-one-step walking style is likely to induce fear of movement because of pain, leading to catastrophic thinking about the actual activity and consequently limiting movement. The aim of this study is to develop a system to induce the sensation of stair climbing through the interaction of the visual and kinesthetic senses. By controlling the amount of movement of the foot and the point of view in virtual space, the system can present a visual image of stair climbing even when the patient steps in a fixed position. This system enables easy motor imagery intervention even for early postoperative patients who have difficulty with the actual stair climbing movement. The clinical intervention experiment confirmed that the smoothness of the knee joint motion during descent was improved by intervening with motor imagery during stair ascent and descent for TKA patients.
著者
Hiroaki Isobe Takuya Takahashi Daikichi Seki Yosuke Yamashiki
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Disaster Research (ISSN:18812473)
巻号頁・発行日
vol.17, no.2, pp.230-236, 2022-02-01 (Released:2022-02-01)
参考文献数
55
被引用文献数
1

Space weather, or the disturbances of the plasma environment driven by the magnetic activities in the Sun in geospace, has become a potential source of disaster for modern society, which is increasingly dependent on its space infrastructure and large-scale power grids. Recently, independent pieces of evidence have been found that support the possibility of extremely intense space weather driven by a “superflare,” a solar phenomenon that modern society has never experienced. This paper reviews state-of-art studies of superflares and their potential impacts.
著者
Koki Aoki Tomoya Sato Eijiro Takeuchi Yoshiki Ninomiya Junichi Meguro
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Robotics and Mechatronics (ISSN:09153942)
巻号頁・発行日
vol.35, no.2, pp.435-444, 2023-04-20 (Released:2023-04-20)
参考文献数
23
被引用文献数
2

To realize autonomous vehicle safety, it is important to accurately estimate the vehicle’s pose. As one of the localization techniques, 3D point cloud registration is commonly used. However, pose errors are likely to occur when there are few features in the surrounding environment. Although many studies have been conducted on estimating error distribution of 3D point cloud registration, the real environment is not reflected. This paper presents real-time error covariance estimation in 3D point cloud registration according to the surrounding environment. The proposed method provides multiple initial poses for iterative optimization in the registration method. Using converged poses in multiple searches, the error covariance reflecting the real environment is obtained. However, the initial poses were limited to directions in which the pose error was likely to occur. Hence, the limited search efficiently determined local optima of the registration. In addition, the process was conducted within 10 Hz, which is laser imaging detection and ranging (LiDAR) period; however, the execution time exceeded 100 ms in some places. Therefore, further improvement is necessary.
著者
Ai Higuchi Junichiro Shiraishi Yuichi Kurita Tomohiro Shibata
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Robotics and Mechatronics (ISSN:09153942)
巻号頁・発行日
vol.32, no.4, pp.798-811, 2020-08-20 (Released:2020-08-20)
参考文献数
28
被引用文献数
4

Parkinson’s disease (PD) is a common progressive neurodegenerative disease that affects a wide range of motor and non-motor symptoms. Freezing of gait (FOG) is such a motor symptom of PD that frequently results in falling, and almost half of PD patients suffer from FOG. In this study, we investigated the effectiveness of a robotic assistance system called UPS-PD, which was developed to suppress FOG. The double limb support phase (DLS) in a 10-m straight-line walking task, the gait time and step counts were measured in five PD subjects. In addition, the safety of the UPS-PD in a healthy person was investigated using OpenSim, and the DLS parameters in four healthy elderly subjects were evaluated. In the experiment with the PD patients, the DLS parameters of two subjects showed an improvement. Furthermore, the step length of one subject and the step length and walking speed of the other subject were improved. Moreover, there were no problems in terms of instability of gait in both the PD patients. The UPS-PD did not adversely affect the gait of healthy elderly subjects and the walking of a healthy subject model in the simulation. Therefore, the UPS-PD is considered to be a useful device for improving walking in PD patients.
著者
Kaito Sato Kenji Sawada
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Robotics and Mechatronics (ISSN:09153942)
巻号頁・発行日
vol.35, no.2, pp.298-307, 2023-04-20 (Released:2023-04-20)
参考文献数
21
被引用文献数
1

In vehicle control, state estimation is essential even as the sensor accuracy improves with technological development. One of the vehicle estimation methods is receding-horizon estimation (RHE), which uses a past series of the measured state and input of the plant, and determines the estimated states based on linear or quadratic programming. It is known that RHE can estimate the vehicular state to which the extended Kalman filter cannot be applied owing to modeling errors. This study proposes a new computational form of the RHE based on primal-dual dynamics. The proposed form is expressed by a dynamic system; therefore, we can consider the computational stability based on the dynamic system theory. In this study, we propose a continuous-time representation of the RHE algorithm and redundant filters to improve the convergence performance of the estimation and demonstrate its effectiveness through a vehicle path-following control problem.
著者
Shigeki Senna Atsushi Wakai Haruhiko Suzuki Atsushi Yatagai Hisanori Matsuyama Hiroyuki Fujiwara
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Disaster Research (ISSN:18812473)
巻号頁・発行日
vol.13, no.5, pp.917-927, 2018-10-01 (Released:2018-10-01)
参考文献数
22
被引用文献数
13

During the 2016 Kumamoto earthquakes, two earthquakes of seismic intensity 7 were observed in Mashiki Town, the foreshock (MJMA 6.5) of April 14 and the main shock (MJMA 7.3) of April 16, resulting in significant damage to structures near the fault. The distribution of damage of houses and other buildings [1] showed a tendency in which damage was concentrated in areas near the surface earthquake fault where the main shock presumably occurred. However, there were locations with slight damage even though they were immediately above the fault and locations with a relatively significant damage even though they were far from the fault. These phenomena are highly likely to be a result of soil structure. First, we built an initial geologic model by collecting boring data in areas of the Kumamoto plain near the fault where damage was severe. Next, we observed microtremors, collected earthquake observational records, and adjusted the layer thickness and S-wave velocity of the initial geologic model. Finally, we built a shallow and deep integrated ground model, compared it to the building damage distribution, and discussed the implications.
著者
Masahiko Inami Hiroyasu Iwata Minao Kukita Yuichi Kurita Kouta Minamizawa Masaaki Mochimaru Takuji Narumi Junichi Rekimoto Kenji Suzuki
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Robotics and Mechatronics (ISSN:09153942)
巻号頁・発行日
vol.33, no.5, pp.985-986, 2021-10-20 (Released:2021-10-20)

Information technologies, such as IoT, artificial intelligence (AI), and virtual reality (VR), have seen so much development that there is now a wide variety of digital equipment incorporated into the infrastructure of daily life. From the agrarian society (Society 1.0) through the information society (Society 4.0), humankind has created farmlands and cities by structuring natural environments physically and has built information environments by structuring them informationally. However, despite the rapid development of information environments, it may be fair to say that the perspectives of the human body have not changed at all since the industrial revolution.In the context of these recent technological developments, greater attention is being paid to human augmentation studies. These studies aim for a new embodiment of “human-computer integration,” one which can physically and informationally compensate or augment our innate sensory functions, motor functions, and intellectual processing functions by using digital equipment and information systems at will, as if they were our hands and feet. It has also been proposed that the technical systems that enable us to freely do what we want by utilizing human augmentations be called “JIZAI” (freedomization) as opposed to “automation.”The term “JIZAI body” used in these studies represents the new body image of humans who will utilize engineering and informatics technologies to act at will in the upcoming “super smart society” or “Society 5.0.” In these studies, human augmentation technologies are an important component of JIZAI, but JIZAI is not the same as human augmentation. JIZAI is different in scope from human augmentation, as it aims to enable humans to move freely among the five new human body images: “strengthened sense” (augmented perception), “strengthened physical body” (body augmentation), “separately-designed mind and body” (out of body transform), “shadow cloning,” and “assembling.” In the society of the future where JIZAI bodies widely prevail, we will use technologies that enable us to do what we have failed at or given up due to limitations of our physical bodies. We believe that a future society, one in which aging does not reduce our capabilities but instead increased options give us hope, can be realized. This special issue, consisting of two review papers and twelve research papers, deals with diverse and wide-ranging areas, including human augmentation, robotics, virtual reality, and others. We would like to express our sincere appreciation to all the authors and reviewers of the papers contributed to this special issue and to the editorial committee of the Journal of Robotics and Mechatronics for their gracious cooperation.
著者
Yoshiaki Kawata
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Disaster Research (ISSN:18812473)
巻号頁・発行日
vol.17, no.2, pp.164-182, 2022-02-01 (Released:2022-02-01)
参考文献数
11
被引用文献数
1

If the Nankai Megathrust Earthquake should occur, it is clear that the disaster would become a national catastrophe. To avoid the decline of Japan caused by such earthquake first of all the proactive measures, improvement of prevention, and the reactive ones, strengthening of recovery, have to be taken by means of Disaster Resilience. Looking back on the history of Japan, we can easily understand that Japan is a lucky country, because it has never experienced the disturbances of war or huge disaster leading to a collapse of the country. However, it has become obvious that if the Nankai Megathrust Earthquake should occur, it would trigger the decline of Japan. Therefore, the Ministry of Disaster Management should be established to prevent a disaster as national catastrophe and collapse of the country. For this reason the main objectives and responses of the Ministry of Disaster Management are clarified in this paper. Especially in the phases of initial response and life rebuilding making use of the experiences of the 2016 Kumamoto Earthquake and recognizing that the Tokai Earthquake cannot be predicted, the issuance of the emergency information of the Nankai Megathrust Earthquake and its problems are discussed and summarized.
著者
Kana Moriyama Daisuke Sasaki Yuichi Ono
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Disaster Research (ISSN:18812473)
巻号頁・発行日
vol.13, no.6, pp.1007-1014, 2018-11-01 (Released:2018-11-01)
参考文献数
26
被引用文献数
20

After the Sendai Framework for Disaster Risk Reduction is adopted, a global database as a tool to monitor disaster loss and damage databases is required. Several disaster loss and damage databases are in use globally. This paper aims to explore how the existing databases vary in three aspects of threshold, spatial resolution, and data quality control, as well as the limitations of the existing databases. We review previous studies comparing the existing global databases and extract the differences and limitations. The threshold of EM-DAT is clear, but its threshold results in ignoring small-scale disasters that DesInventar captures. The differences in disaster threshold create different pictures of disaster losses and/or risks. Regarding spatial resolution, only DesInventar provides disaster impact data at a municipal level, while others provide information at a country level. The limitations of the existing global database are categorized into four aspects, as follows: lack of disaggregated data, limited spatial coverage and resolution, insufficiency of completeness and reliability of data, and insufficient information on indirect loss. The implication from our findings is that, in order to complement the limitations of the existing disaster loss databases to use for decision making on disaster risk reduction, the following are required: cross-checking of data across different databases; complementary disaster loss data; and collection of an exhaustive and firsthand dataset with a transparent and internationally consistent methodology by policy makers.
著者
Masaru Ito Yusuke Funahara Seiji Saiki Yoichiro Yamazaki Yuichi Kurita
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Robotics and Mechatronics (ISSN:09153942)
巻号頁・発行日
vol.31, no.2, pp.231-239, 2019-04-20 (Released:2019-04-20)
参考文献数
15
被引用文献数
12

Japan’s construction industry has a shortage of workers and skilled operators, and the number of operators of hydraulic excavators has actually been decreasing. In addition, the operation of hydraulic excavators is complicated and non-intuitive, so learning and maintaining the skill requires a considerable amount of time and experience. One technology that could solve this problem is the tele-operated hydraulic excavator, but the most common type of tele-operated system is difficult for ordinary hydraulic excavator operators to use. The introduction of operation simulators would be effective, but simulators have to be large and expensive if the interface is reproduced in life size. In this paper, we propose a cross-platform system for operating not only a tele-operated hydraulic excavator but also a hydraulic excavator operation simulator. The cross-platform system uses a tele-operated cockpit with feedback and an interface that gives the operator the sensation of sitting in an actual hydraulic excavator. The cockpit consists of a three-dimensional visual information system using stereo videos and a head mounted display, a motion simulator seat that reproduces the vibration and tilting of the operator’s seat of a hydraulic excavator, and a lever unit used in actual hydraulic excavators. With the cross-platform system, an actual hydraulic excavator can be remotely controlled, and the same cockpit can also be used as a training simulator. One can therefore use the system as an inexpensive means of acquiring and maintaining operation skills. We have successfully produced this proposed system and checked its functions, confirming that it works practically.
著者
Amaly Fong Lee Adan Vega Saenz
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Disaster Research (ISSN:18812473)
巻号頁・発行日
vol.17, no.7, pp.1192-1198, 2022-12-01 (Released:2022-12-01)
参考文献数
28
被引用文献数
1

The work performed by the urban search and rescue (USAR) teams is, from every standpoint, difficult to exactly define, since their main mission, which is to save lives, is joined by a series of tasks typical of disaster risk management, which makes them one of the most complex professions and therefore, with the strictest training requirements. Within these requirements, the fact is that USAR teams must be trained to serve a wide population diversity, which also involves the skills to manage critical situations where an inclusive approach is vital. To face this challenge, it is necessary to develop inclusive strategies according to the reality of these teams. In this article, the authors perform a deep analysis to the existing literature and by means of an exhaustive evaluation get to propose an inclusive model for the USAR teams. This model allows to define not only the reach of the inclusion term in these teams, but also helps to establish strategies to reformulate the training plans and programs of recruiting and retention of new members.
著者
Hiroki Endo Takashi Umeno
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Robotics and Mechatronics (ISSN:09153942)
巻号頁・発行日
vol.29, no.4, pp.767-771, 2017-08-20 (Released:2018-11-20)
参考文献数
17
被引用文献数
5

This paper reported the tensile strength of the difference of modeling condition on the FDM (Fused Deposition Modeling) 3D printer. The FDM 3D printer is rapidly spread with the end of patent protection in 2009. The FDM models mainly use the prototyping part and art, because that models have low strength. This time we paid attention to that actual models weight is lighter than designing models weight to conduct study on strength. And we investigated the cause of the phenomenon of decrease of polymer extrusion by replacing with the injection molding method. The tensile test proved that the strength of model can be improved by the kind of extruder head. This paper reported influence of the cooling in the supply part of extruder head and temperature of the polymer on the strength of FDM 3D models.
著者
Tetsuya Nakamura Steven Lloyd Atsushi Maruyama Satoru Masuda
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Disaster Research (ISSN:18812473)
巻号頁・発行日
vol.16, no.5, pp.840-865, 2021-08-01 (Released:2021-08-01)
参考文献数
59
被引用文献数
1

This paper statistically analyzes residents’ understanding of problems related to radioactively contaminated water discharged from nuclear power and nuclear reprocessing plants. Moreover, this paper examines their impact on the surrounding fisheries by using the cases of La Hague, Sellafield, and Fukushima Daiichi Nuclear Power Plant. Survey data shows that more than 60% respondents disagree with the release of contaminated water, and this sentiment is particularly strong among both British and French respondents. Regarding seafood caught in the vicinity of the nuclear power and nuclear reprocessing plants, although British respondents noted that they hold it in high regard, many people do not purchase this seafood. In contrast, many Japanese respondents reported that they were less concerned, and thus, willingly purchase seafood caught off the coast of Fukushima Prefecture. In all three countries, many people did not trust government information on the release of contaminated water. Compensation to the affected people was provided by the central government, companies involved, and local governments, in that order. Japanese and British respondents reported higher expectation for compensation as compared to French respondents. Japanese and French respondents noted that they have knowledge of radioactive materials and contaminated water, and many of them purchased seafood caught in the vicinity of the nuclear power and reprocessing plants. British respondents were the most opposed to the release of contaminated water, whereas Japanese respondents were the least reliant on government information about the release of contaminated water. Finally, among those who trusted information from the government and retailers, French respondents were the least concerned about contamination. French respondents were also the least likely to expect any compensation for the fishermen affected by contamination. Both British and French residents around the affected plants expected the central government to compensate the affected fishermen, whereas those who did not reside around the affected plants did not expect the fishermen to be compensated. French respondents were more likely to expect compensation from the local governments; affluent respondents were more likely to expect the compensation to be funded by taxation, whereas less affluent respondents expected them to be funded by donations. Respondents who were more skeptical of government information wanted the companies involved to compensate the fishermen. British respondents reported a tendency for wanting the companies involved to provide this compensation, and did not support the concept of compensation provided through donations.
著者
Hajime Mushiake
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Robotics and Mechatronics (ISSN:09153942)
巻号頁・発行日
vol.34, no.4, pp.710-717, 2022-08-20 (Released:2022-08-20)
参考文献数
63
被引用文献数
1

Allostasis is a physiological principle based on a dynamic regulatory system, contrary to homeostasis, in which the goal is to reach a steady state and recover from deviation from a set point in the internal environment. The concept of allostasis has continued to develop with advances in the field of neuroscience. In this short review, the author presents several new findings in neuroscience and extend the concept of allostasis as mutual regulation between cognitive, somatic, and autonomic systems. In this manner, biological systems adapt to external and internal environments by changing themselves.
著者
Hirokazu Yamagata Shuma Kochii Hiroshi Yoshida Yoshifumi Nogi Toshihiro Maki
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Robotics and Mechatronics (ISSN:09153942)
巻号頁・発行日
vol.33, no.6, pp.1223-1233, 2021-12-20 (Released:2021-12-20)
参考文献数
22
被引用文献数
2

The melting of ice and changes in ocean currents in Antarctica must be investigated to understand global climate change. In this regard, the volume changes of sea ice and ice shelves, bathymetry, and ocean currents in the Antarctic Ocean must be measured in three dimensions. Therefore, the use of autonomous underwater vehicles (AUVs), which can directly observe under ice, is being considered. The authors developed an AUV named Mobility Oriented Nadir AntarctiC Adventurer (MONACA) to observe sea ice and the lower region of the ice shelf in the Antarctic Ocean. Herein, we describe MONACA and its basic autonomous navigation methods (altitude control, depth control, and waypoint tracking), as well as report the results of a sea experiment conducted in Shimoda Bay, Japan. During the 5-day sea trial, the MONACA successfully measured bathymetry by tracking 15 waypoints in sequence, switching the control criteria in the -axis direction between 3 m depth and 3 m altitude.
著者
Koichiro Tadokoro Shotaro Fukuda Akio Namiki
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Robotics and Mechatronics (ISSN:09153942)
巻号頁・発行日
vol.34, no.5, pp.956-964, 2022-10-20 (Released:2022-10-20)
参考文献数
24

Our research group has developed an air hockey robot with high-speed vision capable of visual recognition at 500 Hz, which exceeds that of humans. Although this robot uses high-speed vision to increase its reaction speed and improve its performance, it has a low speed to compete with humans because its hand speed is still not sufficiently fast. In this study, a high-speed wrist rotation mechanism using a direct drive motor was introduced to the air hockey robot to improve the hitting speed through the snapping motion of the wrist. Furthermore, we developed a hitting motion algorithm that utilizes high-speed visual feedback. The effectiveness of the proposed system was verified experimentally. The proposed system exhibits an improved motion performance.
著者
Peizhang Li Qing Fei Zhen Chen Xiaolan Yao Yijia Zhang
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Advanced Computational Intelligence and Intelligent Informatics (ISSN:13430130)
巻号頁・発行日
vol.26, no.5, pp.801-807, 2022-09-20 (Released:2022-09-20)
参考文献数
19
被引用文献数
1

The scientific analysis of the slalom training process can significantly improve the performance of athletes. In this paper, the P matrix is defined by extracting the multi-joint space coordinate trajectories of the athletes in the video to analyze the slalom training pattern. The principal component analysis was used to extract the main eigenvalues and eigenvectors of the P matrix, which were defined as the main eigenbehaviors of slalom skiing, and six main eigenbehaviors were used to achieve a similarity of 96% between the reconstructed skiing sequence and the original sequence. Similarly, the group characteristic S matrix is constructed by using the individual eigenbehaviors, and the eigenvectors of the matrix are used to define the characteristic behavior of the group to classify the hierarchical group and determine the group to which the individual belongs. Results show that this method can better identify the movement pattern of the human body’s multi-joint space trajectory in indoor or outdoor slalom skiing, and provide scientific guidance for skiing training, so that athletes can achieve better training effectiveness.
著者
Noriko Shimasaki Hideaki Morikawa
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Disaster Research (ISSN:18812473)
巻号頁・発行日
vol.16, no.1, pp.61-69, 2021-01-30 (Released:2021-01-30)
参考文献数
49
被引用文献数
4

A new infectious disease caused by a novel coronavirus (COVID-19) has spread rapidly worldwide in 2020. The COVID-19 pandemic in Japan can be viewed as an urban disaster because transmission of this respiratory disease tends to occur in densely populated areas. A scientific understanding of the pathogen itself, the cause of the disaster (infectious disease), as well as infection control measures, are important to implement robust and appropriate countermeasures. This review discribes the features, especially the modes of transmission, of COVID-19 and the principles by which infection control is possible using one of the most effective infection control measures – personal protective equipment (PPE). Because COVID-19 is often transmitted to others by asymptomatic individuals through droplets, even those who are unaware of their infection should wear masks to prevent the spread of droplets that may contain the virus and effectively control the spread of disease. However, given the worldwide competition for masks and the urgent requirement of effective controls, it is necessary to conduct further research to establish a system that can supply adequate numbers of masks to regions where many people are infected in the country, with no shortage of masks, in order to make the country more resilient to disasters caused by infectious diseases in the future.
著者
Ryohei Kato Ken-ichi Shimose Shingo Shimizu
出版者
Fuji Technology Press Ltd.
雑誌
Journal of Disaster Research (ISSN:18812473)
巻号頁・発行日
vol.13, no.5, pp.846-859, 2018-10-01 (Released:2018-10-01)
参考文献数
36
被引用文献数
24

Torrential rainfall associated with linear precipitation systems occurred in Northern Kyushu, Japan, during July 5–6, 2017, causing severe damage in Fukuoka and Oita Prefectures. According to our statistical survey using ground rain gauges, the torrential rainfall was among the heaviest in recorded history for 6- and 12-h accumulated rainfall, and was unusual because heavy rain continued locally for nine hours. The predictability of precipitation associated with linear precipitation systems for this event was investigated using a cloud-resolving numerical weather prediction model with a horizontal grid interval of 1 km. The development of multiple linear precipitation systems was predicted in experiments whose initial calculation time was from several hours to immediately before the torrential rain (9:00, 10:00, 11:00, and 12:00 Japan Standard Time on July 5), although there were some displacement errors in the predicted linear precipitation systems. However, the stationary linear precipitation systems were not properly predicted. The predictions showed that the linear precipitation systems formed one after another and moved eastwards. In the relatively accurate prediction whose initial time was 12:00 on July 5, immediately before the torrential rainfall began, the forecast accuracy was evaluated using the 6-h accumulated precipitation (P6h) from 12:00 to 18:00 on July 5, the period of the heaviest rainfall. The average of the P6h in an area 100 km×40 km around the torrential rainfall area was nearly the same for the analysis and the prediction, indicating that the total precipitation amount around the torrential rainfall area was predictable. The result of evaluating the quantitative prediction accuracy using the Fractions Skill Score (FSS) indicated that a difference in location of 25 km (50 km) or greater should be allowed for in the models to produce useful predictions (those defined as having an FSS ≥0.5) for the accumulated rainfall of P6h ≥50 mm (150 mm). The quantitative prediction accuracy examined in this study can be basic information to investigate the usage of predicted precipitation data.