Shiro Koshinaka
In March 1987, Muto won the IWGP Tag Team Championship with Shiro Koshinaka, before losing the titles to Akira Maeda and Nobuhiko Takada six days later. In the summer of 1987, Muto took part in the NOW vs. NEW feud, in which he aligned himself with Antonio Inoki and his group, teaming with the likes of Inoki, Seiji Sakaguchi, Yoshiaki Fujiwara, and Kantaro Hoshino, and battling the likes of Tatsumi Fujinami, Riki Choshu, Akira Maeda, Kengo Kimura, and Super Strong Machine.