LSI Game Mice Party (198x, LCD, Watch Batteries, Model# YG-261-A)
This game is manufactured by Morioka Tokei, Inc. I'm not sure if this was their
own label (they made a lot of games made by several other manufacturers like
Matsushima and Masudaya), or if the distributor just didn't put their name on
it (as I've found several games that just have this 'LSI' logo on them).
Thanks to Petrolpol for the pics.
Do I have this? No.