Koushien is a sports game for the NES, released in Japan, likely focusing on the Japanese high school baseball tournament, Koushien. Its gameplay likely simulates the experience of managing and playing baseball, focusing on batting, pitching, and fielding.  Precise details on the development history and publishing company are scarce and would require further research into Japanese gaming archives.  Given the subject matter, it's likely produced by a company known for sports game development during the NES era.

Koushien (Japan)

Koumakan Remilia