Career
His research is based out of the Sendai"s Ayashi station. Was discovered on October 29, 1991 by Kin Endate and Kazuro Watanabe at Kitami. The Main-belt asteroid was given the name 6097 Koishikawa in honor of Masahiro Koishikawa.
This is a partial list of discoveries made by Masahiro Koishikawa.