children; a son and a daughter. He now owns and operates a dojo in Japan where he trains his A-Square team. In 2012, Kosaka received an honorary Brazilian jiu-jitsu black belt from Yuki Nakai and was appointed a consultant member for the Japanese BJJ Federation. He registered his own grappling system, "TK Jiu Jitsu," shortly after. Championships and accomplishments Fighting Network RINGS 2000 Rising Stars Heavyweight Tournament Semifinalist Lumax Cup Tournament of J'95 Winner Pancrase Hybrid Wrestling Pancrase Super Heavyweight Championship (One time, first, last) Mixed martial arts record |- | Win |align=center|33–21–2 |Mikio Ueda |KO (punches) |Rizin 35 | |align=center|1 |align=center|2:05 |Chōfu, Japan | |- | Loss | align=center | 32–21–2 | Saša Milinković | TKO (doctor stoppage) | HEAT 46 | | align=center|1 | align=center|3:23 | Tokyo, Japan |- | Loss | align=center | 32–20–2 | Mirko Cro Cop | TKO (punches) | RIZIN World Grand-Prix 2017: Final Round | | align=center|1 | align=center|1:02 | Saitama, Japan | |- | Loss | align=center | 32–19–2 | Baruto Kaito | Decision (unanimous) | RIZIN World Grand-Prix 2016: 2nd Round | | align=center | 2 | align=center | 5:00 | Saitama, Japan | |- | Win | align=center| 32–18–2 | James Thompson | TKO (punches) | RIZIN Fighting Federation 1: Day 1 | | align=center| 2 | align=center| 1:58 | Saitama, Japan | |- | Loss | align=center| 31–18–2 | Mark Hunt | TKO (punches) | PRIDE FC: Total Elimination Absolute | | align=center| 2 | align=center| 4:15 | Osaka, Japan | |- | Win | align=center| 31–17–2 | Mario Sperry | TKO (punches) | PRIDE 31 | | align=center| 1 | align=center| 1:20 | Saitama, Japan | |- | Loss | align=center| 30–17–2 | Mike Kyle | Technical Decision (unanimous) | Pancrase: Spiral 8 | | align=center| 3 | align=center| 1:17 | Yokohama, Japan | |- | Win | align=center| 30–16–2 | David Shvelidze | Submission (armbar) | RINGS Russia: CIS vs. The World | | align=center| 1 | align=center| N/A | Yekaterinburg, Russia | |- | Loss | align=center| 29–16–2 | Fedor Emelianenko | TKO (doctor stoppage) | PRIDE Bushido 6 | | align=center| 1 | align=center| 10:00 | Yokohama, Japan | |- | Win | align=center| 29–15–2 | Ron Waterman | Decision (unanimous) | Pancrase: Brave 10 | | align=center| 3 | align=center| 5:00 | Urayasu, Japan | |- | Win | align=center| | Ricardo Morais |