Plot: Kid Niki: Radical Ninja, known in Japan as Kaiketsu Yanchamaru, is an arcade game developed and published by Irem in 1986, and was later published outside Japan by Data East in 1987. The arcade game runs on Irem-62 Hardware, the same as Kung Fu Master. Wikipedia
Plot: Spelunker II: Yūsha e no Chōsen is a Japan-exclusive action video game released for the Family Computer in 1987. An unofficial translation to English was made as a ROM hack. Despite being titled as a sequel to Spelunker, Spelunker II: Yūsha e no Chōsen features vastly different gameplay. Wikipedia...
Plot: Gekitotsu Yonku Battle is a Japan-exclusive video game of the vehicular combat game genre released in 1989 by Irem for the Family Computer. Wikipedia