Tsuyoshi Kosaka will participate in RIZIN FIGHTING WORLD GRAND-PRIX 2015 SAITAMA 3DAYS held at the Saitama Super Arena on December 29th (Tue) and 31st (Thu) of 2015. He is stepping back into the ring 9 years after he announced his retirement followed by his loss against Mark Hunt in May, 2006.

Kosaka was born in 1970, and is 45 years old. He entered RINGS in ’93, and from ’98 he became the first Japanese fighter to fight in the UFC regularly, known as “TK”. He has fought numerous opponents across the world during his RINGS days, including his TKO victory against “The last emperor” Fedor Emelianenko.

After his retirement he has kept busy training the young generation, and commentating on several MMA events. Kosaka was summoned by the Japanese Rugby Association for their National team camp to teach how to tackle and fighting spirit. With his support, the Japanese National team ended up with the biggest upset in Rugby history during the Rugby World Cup 2015 England by beating South Africa.
Kosaka has been training every day even after his retirement and claims that he is in “the best condition of my life”. Being prepared mentally and physically, Tsuyoshi Kosaka is 100% ready to make his comeback.