Seiya Tsutsumi (13-0-3, 8) was born in Kumamoto, Japan on December 24, 1995. At the age of 22 years on March 27, 2018, he made his professional boxing debut against Alongkon Kaisi, winning the fight via 1st-round KO.
On his 14th career fight at 28 years old, Tsutsumi became a bantamweight world champion on October 13, 2024 after defeating Takuma Inoue via 12-round unanimous decision to win the WBA title.
Tsutsumi's last fight was a bantamweight (WBA) world-title defense against Nonito Donaire on December 17, 2025. He won the fight via 12th-round split decision and successfully defended the title. He is currently undefeated and is on a 1-fight winning streak.
Some of Seiya Tsutsumi's best fights were against Takuma Inoue, Daigo Higa and Nonito Donaire. For details about these fights refer to "Best fights of Seiya Tsutsumi".
| # | Date | Opponent | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|
16  | Dec 17, 2025 29 years, 11 months 13-0-3 (8) | 43 years, 1 month 43-8 (28) | BT | 12 | SD | Win Defended WBA |
15  | Feb 24, 2025 29 years, 2 months 12-0-3 (8) | 29 years, 6 months 21-3-1 (19) | BT | 12 | UD | Draw Defended WBA |
14  | Oct 13, 2024 28 years, 9 months 12-0-2 (8) | 28 years, 9 months 20-1 (5) | BT | 12 | UD | Win Won WBA |
13 | Jul 7, 2024 28 years, 6 months 11-0-2 (8) | Weerawat Noolae | BT | 4 | TKO | Win |
12 | Dec 26, 2023 28 years 10-0-2 (7) | Kazuki Anaguchi | BT | 10 | UD | Win |
11  | Aug 30, 2023 27 years, 8 months 9-0-2 (7) | 25 years, 11 months 3-0 (3) | BT | 10 | UD | Win |
10 | Mar 20, 2023 27 years, 2 months 8-0-2 (7) | Jin Minamide | BT | 9 | TKO | Win |
9 | Oct 20, 2022 26 years, 9 months 7-0-2 (6) | Kenshin Oshima | BT | 9 | TKO | Win |
8 | Jun 23, 2022 26 years, 5 months 6-0-2 (5) | Kyosuke Sawada | BT | 8 | TKO | Win |
7 | Oct 26, 2020 24 years, 10 months 5-0-2 (4) | 25 years, 2 months 16-1 (16) | 10 | MD | Draw | |
6 | Jan 28, 2020 24 years, 1 months 5-0-1 (4) | Kazuki Nakajima | 8 | MD | Draw | |
5 | Apr 14, 2022 26 years, 3 months 5-0 (4) | Ryan Rey Ponteras | 1 | TKO | Win | |
4 | Oct 14, 2018 22 years, 9 months 4-0 (3) | Jiaqi Yu | 6 | UD | Win | |
3 | Sep 4, 2018 22 years, 8 months 3-0 (3) | Junpei Inamoto | 1 | TKO | Win | |
2 | Jun 17, 2018 22 years, 5 months 2-0 (2) | Yutthana Narkprasert | 1 | KO | Win | |
1 | Mar 27, 2018 22 years, 3 months 1-0 (1) | Alongkon Kaisi | 1 | KO | Win |
