and pound until the end, capturing the win by unanimous decision. Later that year TK fought Pete Williams at UFC Brazil. Williams went aggressively against Kosaka using his vaunted striking, but Kosaka repeatedly threw him down with uchi mata and transitioned them into armlock attempts, using his defensive guard whenever Williams managed to get back the upper hand. At the end, Tsuyoshi won again by unanimous decision, which gained him a spot in a tournament for the title that was vacated by Randy Couture. At 1999's UFC 18, Kosaka returned to UFC fighting the legendary Bas Rutten in the first round of the "Road to the Heavyweight Title", which was a four-man tournament that would crown the next UFC Heavyweight Champion. Kohsaka dominated most of the fight with his superiority in wrestling and ground and pound, but ultimately lost by TKO when Rutten recovered in overtime and knocked him out with knees and punches. The fight was a source of heated controversy because referee John McCarthy seemed to unfairly stand the fight up when Kohsaka was mounted on Rutten and actively landing clean effective punches. This ordeal would be noted by Jake Rossen of Black Belt magazine, who wrote: "Overall, the event demonstrated an impatience for lengthy ground battles. Fighters were stood up after just a few minutes of grappling, in an apparent effort to maintain action in the matches. [...] This puts strikers, once the underdog of MMA competition, in a prime position to climb to the top." In the same year, TK faced Tim Lajcik at UFC 21, where he won via TKO when Lajcik quit between rounds. Kohsaka again utilized a strategy of strong defense and skilled reversals to set up submissions attempts, eventually sweeping Lajcik against the cage wall and performing a lengthy ground and pound sequence which made Tim's corner throw the towel after the round. Despite carrying injuries from his grueling year schedule, Kosaka also took part in the second UFC event in Japanese soil, UFC 23, where he was pitted against Ruas Vale Tudo exponent Pedro Rizzo. The two contenders spent a round cautiously, until Rizzo switched to aggressive leg kicks and Kohsaka tried to take him down in return. Through the match, Pedro blocked TK's efforts to get it to the ground and landed more punches and leg kicks. After Kohsaka had absorbed a long punishment, Rizzo landed a right punch for