Professor Yorifusa Ishida (1932-2015), who was an IPHS council member, was one of the leading scholars in the research field of city planning in the post-war Japan. His research interest expands so widely to include planning system, planning history, land readjustment, building line, land use controls and planning, development profit, rural planning and citizen participation. He has publicized his research findings, practical proposals, and academic and political views in many books, articles and academic papers. It is rather unfortunate, however, that most of them are published in Japanese and so his attainments are not well known by scholars outside Japan with few exceptions.In this paper, we first trace his life as researcher and professor mainly at Tokyo Metropolitan University. Then we try to review as many academic writings of his as possible in a systematic way in order to analyze the development of his research interests and attainments in his academic carrier for over 40 years. This was made possible because we have obtained fairly detailed information of his curriculum vitae and his publications list thanks to his surviving family.In this analysis, we focus upon his attainments in planning history in particular. Our questions will include:(1) What is, in his framework and interest, the relationship between the research of planning history and that of city planning as a whole?(2) What are his specific and distinctive contributions in the field of planning history? (3) What is his view of planning history, which we need to analyze critically and may be able to learn form?(4) What is the impacts of the western (German, French, British and American) planning upon his research?In conclusion, we try to evaluate the roll of Professor Ishida in the entire history of city planning research in Japan
