He later joined Michinoku Pro Wrestling, where after years in the low card, he became Yone Genjin, a humorous caveman gimmick.

He had a comical feud with Wellington Wilkins Jr. before being sent to Consejo Mundial de Lucha Libre to train, which was in storyline explained as Genjin himself swimming his way to Mexico through the Pacific Ocean.

After a one year hiatus, Yonekawa returned in 2003 under the new gimmick of Kesen Numajiro, (a play with the name of his origin city, Kesennuma), an eccentric enka singer.

Numajiro became famous for coming to the ring while singing, and he even launched several successful singles thanks to Yonekawa's natural voice skills, the first of which was Umi no Tamashii (Sea Soul).

Numajiro and Minamino took part in the Futaritabi Tag Team Tournament 2004, where they advanced to the finals, but they were eliminated by Shanao & Kagetora.