for the sengoku era there's Gekokujo mod for M&B Warband, one of the best conversion out therePlunked about 50 hours into this game since release and have really been loving it. It reminds me a lot of Total War. I have always wanted the ability to participate in the large scale battles of that franchise, and this scratches that itch. It's also a very good game for role-playing. Hoping that future official updates or unofficial mods provide a Chinese-inspired or alternatively Japanese-inspired setting.
The only issue I have had beyond the obvious bugs is that I absolutely suck at swordsmanship! Archery and horseback glaive shenanigans have become my default.
and i think i saw both chinese and japanese conversion projects for bannerlord