Prof. Koshiba and electron-positron physics

Prof. Masatoshi Koshiba was the physicist who initiated the e+e- physics effort in Japan. The first attempt goes back to the 1960s. Following a hard time in the early days the attempt turned out to be successful, leading to a number of productive projects, and eventually supported his neutrino experiments. In this article we detail the history of how these projects developed and entangled.