18,800 of Japanese boys and girls in all parts of Japan were tested, (April to June, 1959) by the AAHPER'S Youth Fitness Test which consists of eight subtests. Our collegues found that Japanese youth had been superior obviously to American youth in the test of chinning, standing broad jump, 50 yards dash. 600 yards run-walk, and shuttle race, and been inferior in only one of them, i.e. sit up. In soft ball throw for distance, both American and Japanese youth showed the same result The present writer has concluded that these difference are due to the physical constitutions, social structure and living style, currriculum and teaching methods of physical education in schools. It is anticipated that the Japanese people might have the lower motor ability in future, if they adapt the foreign mode of life.
A new back strength dynamometer, which is designed to measure directory the back strength with the help of a "rope" attached on the shoulders of the human body, was deviced by the present author. The results obtained here as follows: 1) It was presented that the back strength could be measured without any modification by means of the "rope-type" dynamometer. 2) Difference between the back sterngth with the KYS-type back strength dynamometer and with this new type dynamometer is significant in a case of female subjects whose grip strength is rather weak. 3) It. was revealed to the previous findings that there is no definite correlation between the back strength and the grip strength of the human body.
In order to investigate the actual situation of the rest standing posture of man of daily life, the people waiting electric trains on the platform of the station were protographed at 30minutes intervals from 8.00a.m. to 12.00p.m. The results of this investigation were following: 1) The rest standing postures were classified into 12 types . 2) A standing posture with one leg stepped slightly forwards laterally, which is usually called "standing at ease", is the most popular in them and was found in one thirds of the population at the station. This was classified in this paper as Posture 6. 3) A standing posture with both feet stepped apart laterally was found in a half of all the people. This is divied into three types as Posture 3, 4 and 5 from view points of position of the center of gravity. The same results were found in both male and female. 4) Throughout the whole day, there were no significant changes in appearance of the type of posture.
The posture of the Japanese ground self-defence were investigated try means of the conformateure. The results am as follows: 1) It was revealed that the postures of the defence officials were free from the round shoulder which was characterised in most of the university students from 18 to 22 years of age. 2) The analysis of inclinationα andα', which showed the character of the posture. of the posture "at attention" were the following: at Attention at Rest ∠α -4°~10° -4°~8° ∠α' -2°~14° -2°~14° 3) The age, career and Rohrer's index did not seem to be any definite factors in the posture
The authors studied how such factors as personality, environment, family status ,etc. were related to sucidial attemps in 999 senior high school students. There were some relations between environment, family status, personality and their sucidial attemps, but no relations with economical status of theier family.