Featherweight Wataru Miki (14-7-3) submitted Tomonori Taniguchi (2-6) in a rear naked choke at 4:36 of round three.

Lightweight Yasunori Kanehara (1-4-1) TKO’d “KG Shinto” Hiroki Kuga (1-1) in 55 seconds.

Featherweight Wataru Takahashi (7-8-3) submitted “Randleman” Masayoshi Ichikawa (0-2) by arm bar at 3:43 of round one.

Bantamweight Yoshihiro Matsunaga (1-1) won a unanimous decision over Hirokazu Nishimura (2-2-1).

Bantamweight Masato Kobayashi (1-0) also won a UD over Daisuke Sugishima (0-1).

Cage Force is Japan’s first cage-based MMA promotion and considered a UFC-qualifying promotion for Japanese fighters. Current UFC talents who entered the Octagon after stints in Cage Force include “Thunder” Yushin Okami (23-4), “Outlaw” Dan Hardy (22-6), and “Zenko” Yoshiyuki Yoshida (11-3). That trio alone holds a 12-2 record in the Octagon.

Hironaka fared less well with a 1-3 UFC record, but is riding a two-fight winning streak into the title fight. He TKO’d puroresu’s Katsuhiko Nagata (4-4) at Cage Force 11 in Tokyo 27 June.

Koyama won a UD over Tomonari Kanomata (10-3-3) at Cage Force EX in Tokyo 28 February. If he leaps the hurdle of Hironaka, Koyama could be headed to an Octagon near you soon.

The Cage Force lightweight title was just vacated by Mizuto Hirota (9-3) who has fought his last two battles at Sengoku.

The undercard includes:

Wataru Miki (13-7-3) v Tomonori Taniguchi (2-5)
Yasunori Kanehara (0-4-1) v “KG Shinto” Hiroki Kuga (1-1)
Wataru Takahashi (6-8-3) v “Randleman” Masayoshi Ichikawa (0-1)
Hirokazu Nishimura (2-1-1) v Yoshihiro Matsunaga (0-1)
Masato Kobayashi (0-0) v Daisuke Sugishima (0-0)