With a kendo and amateur wrestling background, Yonekawa trained in and debuted in Gran Hamada"s Universal Lucha Libre in 1992. 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 Junior. 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.
Upon his return, now as a more civilized, Spanish talking version of himself, but his luck did not change, being relegated agai to low card comedy matches.
In 1999, after a head injury, Yone announced he was going to retire and was replaced by similar character Tsubo Genjin, played by Hiroyuki Kotsubo. After several years working as a ring announcer under the name of Kesen Numajiro (a play with the name of his origin city, Kesennuma), he would return to the ring in 2004, adopting the gimmick of an eccentric enka singer.
Characterized by his traditional kimonos and for sporting big eyebrows, Numajiro would came to the ring while singing, and he actually launched several successful singles thanks to Yonekawa"s natural voice skills. He feuded with another music-themed faction, Sailor Boys (Kei and Shu Sato), over which had the best music, and they resolved to prove it in a match in which the loser would have to drop their gimmick.
With the aid of Minamino, Numajiro defeated one of the Satos and stripped them of their music
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. His alliance with Los Salseros Japoneses would last until 2006, when he turned face again and returned to the Michinoku Seikigun. Finishing moves
Kesennuma Drop (Muscle buster, sometimes from the second rope)
Shin Matematika Buster (Elevated cradle neckbreaker) - rarely used
Numa Choke (Guillotine choke)
Shark Finance, Financial Lock (Cross-armed abdominal stretch)
Diving leg drop
Ginrin (Shining wizard)
Hip attack, sometimes from an elevated position
Indian deathlock with theatrics
Michinoku Pro Wrestling
Tohoku Junior Heavyweight Championship (1 time)
Tohoku Tag Team Championship (3 times) – with Kinya Oyanagi (1), Último Dragón (1) and Jinsei Shinzaki (1)
Ichinoseki Puerto Rico Center Cup (2008)
Michinoku Trios League (2005) - with Great Sasuke & Jinsei Shinzaki.