Head coach Yoshinori Shiota (through LA 2028) · 4 national squads · 12 clubs
17th in the world · 495.55 pts (2026-09-15)
| Squad | 15 named |
| Record last 2 years | 10-9-1 in 20 |
World Aquatics Men’s U20 Water Polo Championships 2023
| Squad | — |
| Record | nothing played |
World Aquatics Men’s U18 Water Polo Championships 2024
| Squad | — |
| Record | nothing played |
Water Polo 4x4 Open Championships
| Squad | 8 named |
| Record last 2 years | 3-4 in 7 |
fifteen named · club for 15 of them.
| # | Player | Pos | Born | Club |
|---|---|---|---|---|
| 1 | Towa Nishimura | Goalkeeper | IKAI・Kingfisher74 | |
| 2 | Seiya Adachi | Driver | IKAI・Kingfisher74 | |
| 3 | Taiyo Watanabe | Driver | IKAI・Kingfisher74 | |
| 4 | Daichi Ogihara | Driver | IKAI・Kingfisher74 | |
| 5 | Enishi Ura | Driver | Nippon Sport Science | |
| 6 | Yuki Moriya | Driver | Nippon Sport Science | |
| 7 | Kiyomu Date | Driver | AIDEN | |
| 8 | Mitsuru Takata | Centre Back | IKAI・Kingfisher74 | |
| 9 | Ikkei Nitta | Centre Back | Bourbon WPC Kashiwazaki | |
| 10 | Yusuke Inaba | Driver | Bourbon WPC Kashiwazaki | |
| 11 | Toi Suzuki | Centre Back | IKAI・Kingfisher74 | |
| 12 | Kenta Araki | Centre Forward | IKAI・Kingfisher74 | |
| 13 | Ren Sasano | Goalkeeper | IKAI・Kingfisher74 | |
| 14 | Jun Lowrey | Centre Forward | Nippon Sport Science | |
| 15 | Kai Inoue | Driver | Bourbon WPC Kashiwazaki |
12 clubs
| 99 99club |
| AI AIDEN |
| BK Bourbon WPC Kashiwazaki |
| IK IKAI・Kingfisher74 |
| IN Ineikai |
| KC Kenshidai Club |
| ME Meiji |
| NS Nippon Sport Science |
| S3 Sanken 30CLUB |
| SE Senshu |
| UT University of Tsukuba |
| YS Yamagata SHARKS |
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