著者

三宅 恵介 松井 崇 佐藤 武尊 横山 喬之 竹澤 稔裕 川端 健司 秋本 啓之

出版者

日本武道学会

雑誌

武道学研究 (ISSN:02879700)

巻号頁・発行日

vol.47, no.1, pp.19-27, 2014

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The All-Japan Judo Championships (AJJC) is an open-weight tournament for determining the best judoka in Japan. The AJJC has been held under the Kodokan Judo Refereeing Rules (KDK Rules) since 1951. In 2011, the All-Japan Judo Federation (AJJF) introduced the International Judo Federation Refereeing Rules (IJF Rules), which were formulated to facilitate more dynamic judo (increased wins by <i>ippon</i>, decreased wins by judges' decisions, and decreased <i>mate</i>-time). Although the IJF Rules has facilitated dynamic judo in international competitions, their effects on the competition contents in the AJJC are still unknown. Here, we aimed to clarify whether the introduction of the IJF Rules facilitated dynamic judo in the AJJC.<BR>The 221 judo matches in the AJJC from 2008 to 2013 were separated into two groups, the tournaments following the KDK Rules (2008-2010) and those following the IJF Rules (2011-2013). Their data were extracted from the AJJC records by<i> Judo</i>, the official Kodokan journal, and from the match videos recorded by the AJJF. We analyzed the proportions of winning contents (wins by <i>ippon</i> or superior performance), winning methods (points from techniques or penalties, or judges' decisions), techniques for getting points (<i>te-waza, koshi-waza, ashi-waza, sutemi-waza, </i>or<i> katame-waza</i>) and the <i>mate</i>-time for each match. A chi-square test and an independent <i>t</i>-test were used to perform statistical analyses, and for each test, statistical significance was assumed at <i>P</i> value < 0.05.<BR>For the winning methods of the IJF Rules' and the KDK Rules' tournaments, the proportion of points from techniques (60.4% vs. 53.6%) and points from penalties (23.4% vs. 15.5%) showed no differences, but the proportion of wins by judges' decisions in the IJF Rules' tournaments was significantly lower than in the KDK Rules' tournaments (16.2% vs. 30.9%) (P < 0.05). Furthermore, the <i>mate</i>-time in the IJF Rules' tournaments was significantly shorter than in the KDK Rules' tournaments (77 s vs. 105 s) (P < 0.01). However, the winning contents and techniques for obtaining points showed no differences between the IJF Rules' and the KDK Rules' tournaments.<BR>We confirmed for the first time that the IJF Rules did not affect the winning contents and techniques for getting points, but decreased the proportion of judges' decisions and <i>mate</i>-time in the AJJC. These findings suggest that the IJF Rules partially facilitated dynamic judo in the AJJC.

著者

村山 晴夫 一杉 正仁 本澤 養樹 石川 美久 三宅 恵介 小山 勝弘

出版者

日本武道学会

雑誌

武道学研究 (ISSN:02879700)

巻号頁・発行日

vol.46, pp.110, 2013

著者

三宅 恵介 竹澤 稔裕 伊藤 潔 佐藤 伸一郎 廣瀬 伸良

出版者

日本武道学会

雑誌

武道学研究 (ISSN:02879700)

巻号頁・発行日

vol.54, no.2, pp.103-113, 2022-03-31 (Released:2022-04-07)

参考文献数

36

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The purpose of this study was to clarify the tactical actions of nage-waza that are effective in scoring in judo by using a notational match performance analysis, and to provide useful knowledge in the practical field of coaching. For this purpose, we examined the relationship between (1) the type of nage-waza, (2) whether there was a renraku-henka in the nage-waza, and (3) the combination of the tori and the uke’s kumite and whether an athlete scored any points. Data from a total of 441 matches in the −60kg, −81kg, and +100kg weight classes in international competitions held in 2020 were used.The tactical actions associated with whether points were scored or not were the type of nage-waza and whether they included a renraku-henka. The combination of tactical actions that influenced the points scored was a combination of henka-waza and te-waza, and in some weight classes, combinations of henka-waza and other techniques were also effective. The combination of henka-waza and sumi-otoshi, which is classified as a te-waza, showed the highest scoring ratio in all weight classes.This study suggests for the first time that henka-waza, especially sumi-otoshi, applied during or after the opponent’s attack, is an effective tactical action for scoring regardless of weight class. These new findings indicate that in current judo competitions it is important to not only pursue single techniques but to construct tactical actions relative to the opponent. They are also expected to be useful for specific guidance in coaching.