This was at the 1989 Daikomyosai (大光明祭) seminar at the Meiji Kinenkan (明治記念館) in Tōkyō.
Back row (standing, left to right): Roy Bradford, Manaka Sensei (while still in the Bujinkan), Douglas Craddock, Me (Peter King), Graham Ramsden & Simon Morris.Front row (seated, left to right): Ishizuka Sensei, Hatsumi Sensei, Noguchi Sensei & Kan Sensei.