The paper examines whether postal savings in Japan before world war II had been small savings or not. This topic has been argued for a long period, but we can not get a clear conclusion. This paper analyzes it concretely through various materials and data. Its main point is a special attention to savings in corporative society. Especially, this paper investigates for which name had been deposited, representative name or individual name. Through clarifying this problem this paper aims to throw some light on the discussion about the so-called "smallness" in postal savings. This paper analyzes three periods separately, (1) before World War I, (2) during World War I and july 1937, (3) until the end of World War II. However, about period (3) our research is very limited because the government compelled people to deposit money in all banking facilities especially in postal savings banks, in this period.
