[Table] header: Res. | Record | Opponent | Method | Event | Round | Time | Location row 1 : Loss | 34–9 (1) | Diego Sanchez | Decision (split) | UFC on Fuel TV: Silva vs | 3 | 5:00 | Saitama , Japan
row 2 : Win | 34–8 (1) | Mac Danzig | Decision (split) | UFC on Fuel TV: Franklin vs | 3 | 5:00 | Cotai Strip , Macau
row 3 : Win | 33–8 (1) | Eiji Mitsuoka | TKO (punches) | UFC 144 | 2 | 2:21 | Saitama , Japan
row 4 : Loss | 32–8 (1) | Nate Diaz | Submission (armbar) | UFC 135 | 1 | 4:27 | Denver, Colorado , United States
row 5 : Loss | 32–7 (1) | Clay Guida | Submission (guillotine choke) | UFC 125 | 2 | 4:27 | Las Vegas, Nevada , United States
row 6 : Win | 32–6 (1) | Tyson Griffin | KO (punch) | UFC Live: Jones vs. Mat | 1 | 1:04 | San Diego, California , United States
row 7 : Loss | 31–6 (1) | Kenny Florian | Submission (rear naked choke) | UFC Fight Night: Florian vs | 3 | 2:52 | Charlotte, North Carolina , United States
row 8 : Win | 31–5 (1) | Tony Hervey | Decision (unanimous) | Vale Tudo Japan 2009 | 5 | 5:00 | Tokyo , Japan
row 9 : Win | 30–5 (1) | Takashi Nakakura | KO (punches) | Shooto: Tradition Final | 2 | 4:42 | Tokyo , Japan
row 10 : Loss | 29–5 (1) | Satoru Kitaoka | Submission (achilles lock) | Sengoku Rebellion 2009 | 1 | 1:41 | Saitama , Japan
row 11 : Loss | 29–4 (1) | Sergey Golyaev | Decision (split) | Sengoku 6 | 3 | 5:00 | Saitama , Japan
row 12 : Win | 29–3 (1) | Seung Hwang Bang | Decision (unanimous) | Sengoku 4 | 3 | 5:00 | Saitama , Japan
row 13 : Win | 28–3 (1) | Duane Ludwig | TKO (doctor stoppage) | Sengoku 1 | 1 | 2:28 | Tokyo , Japan
row 14 : NC | 27–3 (1) | Nick Diaz | NC (overturned by NSAC ) | Pride 33 | 2 | 1:46 | Las Vegas, Nevada , United States
row 15 : Win | 27–3 | Mitsuhiro Ishida | TKO (strikes) | Pride Shockwave 2006 | 1 | 1:14 | Saitama , Japan
row 16 : Win | 26–3 | Marcus Aurélio | Decision (split) | Pride Bushido 13 | 2 | 5:00 | Yokohama, Kanagawa
row 17 : Win | 25–3 | David Baron | Submission ( rear naked choke ) | Pride Bushido 12 | 1 | 7:10 | Nagoya, Aichi ,
row 18 : Loss | 24–3 | Marcus Aurélio | Technical submission (arm-triangle choke) | Pride Bushido 10 | 1 | 4:34 | Tokyo , Japan
row 19 : Win | 24–2 | Hayato Sakurai | KO (punches) | Pride Shockwave 2005 | 1 | 3:56 | Saitama , Japan
row 20 : Win | 23–2 | Luiz Azeredo | Decision (unanimous) | Pride Bushido 9 | 2 | 5:00 | Tokyo , Japan
row 21 : Win | 22–2 | Tatsuya Kawajiri | Submission ( rear naked choke ) | Pride Bushido 9 | 1 | 7:42 | Tokyo , Japan
row 22 : Win | 21–2 | Jean Silva | Decision (unanimous) | Pride Bushido 8 | 2 | 5:00 | Nagoya, Aichi ,
row 23 : Win | 20–2 | Luiz Azeredo | KO (punches) | Pride Bushido 7 | 1 | 3:46 | Tokyo , Japan
row 24 : Win | 19–2 | Jens Pulver | KO (punch) | Pride Shockwave 2004 | 1 | 6:21 | Saitama , Japan
row 25 : Win | 18–2 | Charles Bennett | Technical submission ( kimura ) | Pride Bushido 5 | 1 | 5:52 | Osaka , Japan
row 26 : Win | 17–2 | Fabio Mello | TKO (punches) | Pride Bushido 4 | 1 | 8:07 | Nagoya, Aichi ,
row 27 : Win | 16–2 | Ralph Gracie | KO (knees) | Pride Bushido 3 | 1 | 0:06 | Yokohama, Kanagawa
row 28 : Win | 15–2 | Jadyson Costa | TKO (punches) | Pride Bushido 2 | 1 | 4:55 | Yokohama, Kanagawa
row 29 : Loss | 14–2 | B.J. Penn | Submission ( rear naked choke ) | Rumble on the Rock 4 | 3 | 2:35 | Honolulu, Hawaii , United
row 30 : Loss | 14–1 | Joachim Hansen | Decision (majority) | Shooto in Yokohama Gymnasium | 3 | 5:00 | Yokohama, Kanagawa
row 31 : Win | 14–0 | Nick Ertl | Submission ( armbar ) | Shooto: 2/23 in Korakuen | 1 | 4:59 | Tokyo , Japan
row 32 : Win | 13–0 | Dokonjonosuke Mishima | TKO (punches) | Shooto 2002 Year-End Show | 2 | 0:52 | Urayasu, Chiba 
row 33 : Win | 12–0 | Chris Brennan | Decision (unanimous) | Shooto: Treasure Hunt 10 | 3 | 5:00 | Yokohama, Kanagawa
row 34 : Win | 11–0 | Leonardo Santos | Decision (majority) | Shooto: Treasure Hunt 7 | 3 | 5:00 | Sakai, Osaka , Japan
row 35 : Win | 10–0 | Rumina Sato | Decision (unanimous) | Shooto - To The Top Final Act | 3 | 5:00 | Urayasu, Chiba 
row 36 : Win | 9–0 | Ryan Bow | Decision (unanimous) | Shooto - R.E.A. | 3 | 5:00 | Tokyo , Japan
row 37 : Win | 8–0 | Paul Rodriguez | Decision (unanimous) | Shooto - R.E.A. | 3 | 5:00 | Tokyo , Japan
row 38 : Win | 7–0 | Huanderson Pavao | Decision (unanimous) | Shooto - R.E.A. | 3 | 5:00 | Kadoma, Osaka , Japan
row 39 : Win | 6–0 | Johnny Eduardo | Submission ( rear naked choke ) | Vale Tudo Japan 1999 | 3 | 1:43 | Urayasu, Chiba 
row 40 : Win | 5–0 | Takuya Kawabara | Decision (unanimous) | Shooto - Renaxis 4 | 3 | 5:00 | Tokyo , Japan
row 41 : Win | 4–0 | Stephen Palling | Submission ( rear naked choke ) | SuperBrawl 12 | 1 | 3:06 | Honolulu, Hawaii , United
row 42 : Win | 3–0 | Takuya Kuwabara | Decision (unanimous) | Shooto - Renaxis 1 | 3 | 5:00 | Tokyo , Japan
row 43 : Win | 2–0 | Kazumichi Takada | TKO (punches) | Shooto - Devilock Fighters | 2 | 3:42 | Tokyo , Japan
row 44 : Win | 1–0 | Hiroshi Tsuruya | Decision (unanimous) | Shooto - Las Grandes Viaje | 3 | 5:00 | Tokyo, Japan [/Table] Answer this question based on the above table: What is the number of rounds that took place for the fight that lasted 6:21?

Answer: 1.0