IPSJ (Information Processing Society of Japan), which was launched in 1960, formed the Computer History Committee in 1970 in order to record the early history of Japanese computers. The Committee has continued its activities, publishing history related books, maintaining the Virtual Computer Museum web pages, editing articles about old computers and technologies, etc. Recently, it started another mission, searching and nominating the Information Processing Technology Heritages. The present paper surveys the Committee's long time loci in a concise way.