Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Res. | Record | Opponent | Method | Event | Round | Time | Location |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Loss | 23-17-4 | Yasuaki Kishimoto | Decision (unanimous) | Deep - Osaka Impact | 3.0 | 5:00 | Osaka , Japan |
| Loss | 23-16-4 | Satoru Kitaoka | Decision (unanimous) | Deep - 53 Impact | 3.0 | 5:00 | Osaka , Japan |
| Win | 23-15-4 | Yuki Ito | Decision (unanimous) | DEEP - 45 Impact | 3.0 | 5:00 | Osaka , Japan |
| Loss | 22-15-4 | Ryo Chonan | Decision (unanimous) | DEEP - 43 Impact | 3.0 | 5:00 | Tokyo , Japan |
| Loss | 22-14-4 | Koichiro Matsumoto | Decision (unanimous) | DEEP - 40 Impact | 3.0 | 5:00 | Tokyo , Japan |
| Win | 22-13-4 | Yong Fun Lee | TKO (punches) | DEEP - Gladiator | 2.0 | 2:26 | Tokyo , Japan |
| Win | 21-13-4 | Shigetoshi Iwase | Decision (unanimous) | DEEP - 35 Impact | 2.0 | 5:00 | Tokyo , Japan |
| Loss | 20-13-4 | Sung Hwan Pang | TKO (punches) | DEEP - 33 Impact | 2.0 | 1:15 | Tokyo , Japan |
| Draw | 20-12-4 | Kiuma Kunioku | Draw | DEEP - 30 Impact | 3.0 | 5:00 | Osaka , Japan |
| Loss | 20-12-3 | Hidehiko Hasegawa | Decision (majority) | DEEP - 28 Impact | 3.0 | 5:00 | Tokyo , Japan |
| Loss | 20-11-3 | Fabricio Monteiro | Decision (unanimous) | DEEP - 26 Impact | 3.0 | 5:00 | Tokyo , Japan |
| Win | 20-10-3 | Kousei Kubota | TKO (soccer kicks) | DEEP - 25th Impact | 2.0 | 2:08 | Tokyo , Japan |
| Win | 19-10-3 | Seichi Ikemoto | Decision (majority) | Real Rhythm - 3rd Stage | 3.0 | 5:00 | Osaka , Japan |
| Draw | 18-10-3 | Won Jin Eoh | Draw | DEEP - 20th Impact | 3.0 | 5:00 | Tokyo , Japan |
| Loss | 18-10-2 | Marcus Aurélio | Decision (unanimous) | PRIDE Bushido 8 | 2.0 | 5:00 | Nagoya , Japan |
| Win | 18-9-2 | Kyosuke Sasaki | Decision (unanimous) | Real Rhythm - 1st Stage | 3.0 | 5:00 | Osaka , Japan |
| Win | 16-9-2 | Daisuke Nakamura | TKO (punches) | DEEP - 16th Impact | 3.0 | 3:16 | Tokyo , Japan |
| Win | 17-9-2 | Shinya Aoki | KO (punch) | DEEP - 16th Impact | 1.0 | 4:29 | Tokyo , Japan |
| Win | 15-9-2 | Kenji Arai | Submission (triangle choke) | DEEP - 15th Impact | 1.0 | 4:04 | Tokyo , Japan |
| Loss | 14-9-2 | Akira Kikuchi | Decision (majority) | Shooto 2004 - 5/3 in Korakuen Hall | 3.0 | 5:00 | Tokyo , Japan |
| Win | 14-8-2 | Sauli Heilimo | Submission (reverse triangle choke) | Shooto 2003 - 7/13 in Korakuen Hall | 2.0 | 0:39 | Tokyo , Japan |
| Win | 13-8-2 | Deshaun Johnson | Submission (keylock) | SB 27 - SuperBrawl 27 | 1.0 | 4:53 | Hawaii , United States |
| Loss | 12-8-2 | Sean Sherk | Decision (unanimous) | UFC 36 | 3.0 | 5:00 | Nevada , United States |
| Win | 12-7-2 | Takuya Wada | Submission (triangle choke) | Shooto - To The Top Final Act | 1.0 | 4:07 | Tokyo , Japan |
| Win | 11-7-2 | Tony DeSouza | KO (punch) | UFC 33 | 2.0 | 0:15 | Nevada , United States |
| Win | 10-7-2 | LaVerne Clark | Technical Submission (triangle choke) | HOOKnSHOOT - Masters | 3.0 | 3:50 | Indiana , United States |
| Win | 9-7-2 | Thomas Denny | Submission (front strangle choke) | Shooto - To The Top 2 | 3.0 | 3:09 | Tokyo , Japan |
| Draw | 8-7-2 | Steve Berger | Draw | HOOKnSHOOT - Fusion | 3.0 | 5:00 | Indiana , United States |
| Loss | 8-7-1 | Dan Gilbert | TKO (doctor) | Shooto - R.E.A.D. 8 | 3.0 | 4:02 | Osaka , Japan |
| Loss | 8-6-1 | Ray Cooper | Decision (unanimous) | Shooto - R.E.A.D. 1 | 3.0 | 5:00 | Tokyo , Japan |
| Win | 8-5-1 | Rafles la Rose | Submission (triangle choke) | Shooto - Renaxis 5 | 1.0 | 2:17 | Osaka , Japan |
| Loss | 7-5-1 | Dave Menne | Decision (unanimous) | SB 13 - SuperBrawl 13 | 3.0 | 5:00 | Hawaii , United States |
| Loss | 7-4-1 | Tetsuji Kato | Decision (unanimous) | Shooto - 10th Anniversary Event | 3.0 | 5:00 | Yokohama , Japan |
| Win | 7-3-1 | Pat Miletich | Technical Submission (triangle choke) | SB 11 - SuperBrawl 11 | 1.0 | 9:22 | Hawaii , United States |
| Win | 6-3-1 | Kohichi Tanaka | Submission (triangle choke) | Shooto - Shooter's Dream | 1.0 | 3:56 | Tokyo , Japan |
| Loss | 5-3-1 | Hayato Sakurai | Decision (unanimous) | Shooto - Las Grandes Viajes 3 | 3.0 | 5:00 | Tokyo , Japan |
| Win | 5-2-1 | Jay R. Palmer | Submission (rear naked choke) | Shooto - Las Grandes Viajes 1 | 1.0 | 3:51 | Tokyo , Japan |
| Win | 4-2-1 | Steve Nelson | Submission (triangle choke) | VTJ 1997 - Vale Tudo Japan 1997 | 2.0 | 5:31 | Tokyo , Japan |
| Win | 3-2-1 | Tetsuji Kato | Submission (armbar) | Shooto - Reconquista 3 | 3.0 | 4:56 | Tokyo , Japan |
| Draw | 2-2-1 | Akihiro Gono | Draw | Shooto - Gig | 3.0 | 5:00 | Tokyo , Japan |
| Loss | 2-2 | Susumu Yamasaki | Decision (majority) | Daidojuku - WARS 4 | 3.0 | 3:00 | Tokyo , Japan |
| Loss | 2-1 | Alex Cook | Submission (rear naked choke) | Shooto - Let's Get Lost | 2.0 | 1:50 | Tokyo , Japan |
| Win | 2-0 | Naoto Kojima | Submission (rear naked choke) | Shooto - Vale Tudo Junction 2 | 2.0 | 1:42 | Tokyo , Japan |
| Win | 1-0 | Yasunori Okuda | TKO (punches) | Shooto - Vale Tudo Junction 1 | 1.0 | 1:18 | Tokyo , Japan |
Question:
What method was used in the match that went to round 1, and had a 6-3-1 record?
Answer:
Submission (triangle choke)