DeChief
Member
I wasn't able to find these these anywhere, so here are the .imz files just in case someone else needs them.
http://www.mediafire.com/download/mb5tatwanyvmra7/Toshiba+J-3100+Japanese+MS-DOS+V3.10.rar
http://www.mediafire.com/download/mb5tatwanyvmra7/Toshiba+J-3100+Japanese+MS-DOS+V3.10.rar