Short for Nihon Micom Kaihatsu. NMK started as a subcontractor for companies like Jaleco, American Sammy, and UPL before it started publishing games under its own label in 1991.
Went bankrupt on September 16, 1999, though by that point the company had switched from video game development to electro-mechanical arcade games. Rights for all games were acquired by Hamster Corporation on June 29, 2017.