Morita Shogi 64

Morita Shogi 64 (森田将棋64) is a Japanese virtual board game for the Nintendo 64. It was released only in Japan in 1998.
It is the sequel to Saikyō Habu Shōgi, a launch game for the Nintendo 64.

It has a built-in RJ-42 Modem Connection port with which players were able to connect to (now defunct) servers to play against other players all around Japan.