Minakuchi Engineering (水口エンジニアリング) was a Japanese video game developer founded in 1984 and active until the early 2000s. They provided outsorced development for other companies.
Minakuchi was responsible for the development of various entries in the Mega Man series during the early to mid 1990s. They handled most of the Mega Man games on the Game Boy (all except Mega Man II, which was developed by Japan System House), the compilation title Mega Man: The Wily Wars for the Sega Genesis, and large portions of Mega Man X3 for the SNES. In all, they worked on six Mega Man titles, making them the third-most prolific Mega Man developer after Capcom and Inti Creates.
Their other work with Capcom included the Game Boy version of Bionic Commando, as well as the SNES port of Magic Sword.
It is also rumored that Minakuchi was responsible for a beta of Street Fighter II for the Sega Genesis, which Capcom found unsatisfactory and discarded in favor of an in-house port.