著者
川名 はつ子 野中 浩一 三浦 悌二
出版者
日本生気象学会
雑誌
日本生気象学会雑誌 (ISSN:03891313)
巻号頁・発行日
vol.31, no.1, pp.31-36, 1994-04-01 (Released:2010-10-13)
参考文献数
24
被引用文献数
1

日本では早生まれの多い現象が1960年代半ばにはほとんど消えて, 1年中ほぼ平均して生まれるようになった.隣接する韓国・朝鮮との差異を検討するため, 日本人と朝鮮・韓国人の出生季節分布を, 古くからの記録を用いて約300年にわたり比較した.出生数の「早春の山と初夏の谷」の傾向が最もはっきりしていたのは, 19世紀以降のおよそ1世紀半の間の日本であり (山/谷比=約1.5) , その間, 朝鮮・韓国では分布の形は日本と同様ながら, その変動幅は小さかった (山/谷比=約1.1) .ところが日本で季節性の消失した1960年代以降にも, 韓国では早生まれが減少せず, とくに1970年代には「早春の山と初夏の谷」はむしろ明瞭になりつつあるという違いが生じている.日本の早生まれ喪失現象が, 一般に言われていたような, 冷暖房や冷蔵庫の普及などによる脱季節化に起因するものならば, 韓国でも何年かの時差はあっても同様の経過をたどるはずなのに, 却って差が拡大していることから, 冷暖房や冷蔵庫の普及などとは別の要因が働いているらしいことが示唆された.
著者
中尾 寛子 志村 正子 青山 英康 三浦 悌二
出版者
日本民族衛生学会
雑誌
民族衛生 (ISSN:03689395)
巻号頁・発行日
vol.55, no.4, pp.159-168, 1989 (Released:2010-06-28)
参考文献数
15

The relationships between the eruption order of the first permanent teeth on children in a kindergarten, way of feeding at infancy, and taste at the present time were examined. The aim of this study was to investigate the effects of their daily consuming foods including at their infancy on the changes in the eruption order of the first permanent teeth from the first permanent molar (M1) to the central permanent incisor (I1). One hundred and fourty-nine children (82 boys and 67 girls) whose first permanent tooth was mandibular I1 (I-type children) were compared with 111 children (48 boys and 63 girls) whose first permanent tooth was mandibular M1(M-type children) on their ways of feeding at infancy and their taste at the present time. Results were as follows: 1) In both sexes, the evident relationship was observed between the eruption order of the first permanent teeth and the ways of feeding in infancy. M-type children were breast fed for longer time than I-type children. In the discriminant analysis, breast feeding was related to the M-type eruption, and bottle feeding was related to the I-type eruption. 2) Weaning was started earlier in M-type children than in I-type children. The rate of the children who began weaning earlier than 4-months old was significantly higher in M-type children than in I-type children. 3) The M-type children liked fruits and fish more than I-type children. 4) These results suggest that elevated sucking and chewing frequency by breast feeding and early start of weaning at infancy influenced the eruption order of the first permanent teeth as well as the growth of the mandible.
著者
志村 正子 三浦 悌二
出版者
The Japanese Society of Health and Human Ecology
雑誌
民族衛生 (ISSN:03689395)
巻号頁・発行日
vol.44, no.4, pp.165-174, 1978

Changes in birth distribution pattern during a few centuries were investigated in both Japan and the USA, using various forms of records. Regional differences in seasonal birth distribution, and their connection with birth rates and marriage seasons were also studied. The following conclusions were drawn. 1) From the second half of the 19th century to the first half of the 1960's, seasonal distribution of births in Tokyo and Osaka showed a fluctuating pattern with a peak from January to March and a trough between May and August. Most variations during that period were in the amplitude of the basic pattern. 2) Old registration books of parishoners known as 'Ninbetsu-cho' of three towns in Osaka City revealed a peculiar pattern with a sharp peak between November and December, ( October and November of the lunar calender) from 1755 to 1867. 3) Japanese birth distribution became less noticeable in the 1960's and the 1970's with very low peak between July and August similar to that formed in the USA. 4) In USA, there is a secular change of shifts of peaks in different periods. The typical pattern with a peak between Aug. and Sep. can be seen from the second half of the 18th century to the first half of the 19th century and again after 1930. During certain periods since the 17th century, different patterns are apparent: e. g. a wide peak between May and September until the 1970's, or a pattern with two peaks in spring and autumn from the second half of the century until the 1920's. 5) Regional differences of the birth distribution in Japan gradually decreased and have reached uniformity throughout Japan. (6) As for the relationships between birth seasonality and regional birth rates, regional birth rates fell in summer, becoming lower as one travels south. 7) As for the relationship between birth seasonality and annual birth rate, a distinct difference was seen in the peak season of Jan.-Mar., and the birth rate in the trough season of May-July changed little until World War II when contraception became popular in Japan. 8) Prior to World War II the seasonal distribution of marriages in Japan was typified by peaks in spring. After the Wax it changed to a pattern with peaks in both spring and late autumn. Seasonal differences of marriages increased, in contrast to birth patterns. 9) Comparing the distribution of marriage ceremonies and registrations after World War II in Japan, seasonal variance was larger for ceremonies than registrations. The marriage registration peak shifted ahead one or two months. This suggests that most marriages were registered several months later than ceremonies. In the 1970's, however, this difference was reduced. 10) It seems worthwhile to consider the possibility that certain seasonal biological suppressing factors varying in period and by region may be responsible for the distributional birth pattern.
著者
三浦 悌二
出版者
帝京大学
雑誌
一般研究(C)
巻号頁・発行日
1988

今回の研究対象としたハッテライトは、ヨーロッパ、ロシアを経て、19世紀末にアメリカ、カナダに移住したキリスト教の一派で、きわめて多産な集団として有名である。研究代表者が今世紀前半の日本のデータから推測した「季節性の不妊」が、この集団にも起っているかどうかを知ることが今回の研究の基本的な目的であった。出生結婚などが書かれた家族単位の台帳を入手し、計算機に入力して解析を行なった。1.出生の季節性とその長期変動:ハッテライトの結婚の季節には大きな偏り(10月と11月、近年ではさらに6月が多い)があり、第1子の出生季節に強く影響していた。この影響を除くと、春と秋にやや多く、初夏に少ないという、かつてのヨーロッパや日本と類似した型であったが、その変動幅は年平均を中心として±10%未満であり、とくに20世紀に入ってからは変動が小さかった。2.結婚初産間隔:1966年以降生れの母親では中央値が10.5か月と短く、19世紀の12〜15か月と比較しても短かかった。この結果からは、この集団の潜在的出産力が近年減少しているという見方は支持できない。3.母親の出生季節別にみたハッテライトの出生季節性:初夏の出生数の減少が環境中の季節性不妊因子によるとする仮説を、この季節生れの母親が年間平均して出産していた日本のデータから提唱してきた。同様にして今回の集団で、第1子を除いた出生の季節分布を母親の出生季節別に比較したが、各群に顕著な差は認めなかった。4.双生児出産の季節性と母親の出生季節:この集団の双生児出産頻度は0.9%と、一般の西欧白人の1.1%に比べて高くなかった。しかし5ー7月での頻度が少なく、また5ー7月生れの母親で異性双生児が有意に少なかったことから、季節性にはたらく環境要因が、多排卵、もしくは双生児の着床・妊娠の維持に作用している可能性も考えられた。