Takeda Shingen for the PC Engine is a re-worked port of Jaleco's samurai-themed arcade brawler. It's an entirely new game with different enemies, stages, and bosses. It also introduces light RPG elements such as conversing with NPCs and gaining experience points from defeating enemies to level up.
This is the only PC Engine brawler that's on a HuCard rather than a CD.
River City Ransom is another PC Engine brawler with RPG elements.
The PC Engine version of Takeda Shingen is a lot better than the original. It's average rather than terrible. The new RPG elements spice up the otherwise boring gameplay, the graphics are brighter, and the music is catchier. Still, it's a middle-of-the-road brawler with lukewarm action and little to set itself apart.