Abstract
For the purpose of decision of nutritional requirement for prisoners, absorption rate of food, basal metabolism, body density and blood gravity were measured during 36 days.
From the results obtained such as the higher absorption rate of food, decrease of body weight and basal metabolic rate, and negative nitrogen balance, all of which were caused by 2100 calories supply, it is considered that the present scheme supplying 2100 cal. is not enough for prisoners engaging in no work.