Sumitada Moriguchi
Nagaoka and Moriguchi at the 2025 World Championships | ||||||||||||||||||||
| Personal information | ||||||||||||||||||||
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| Native name | 森口 澄士 | |||||||||||||||||||
| Born | December 29, 2001 | |||||||||||||||||||
| Home town | Kyoto | |||||||||||||||||||
| Height | 1.74 m (5 ft 9 in) | |||||||||||||||||||
| Figure skating career | ||||||||||||||||||||
| Country | Japan | |||||||||||||||||||
| Discipline | Pair skating (since 2022) Men's singles (2012–23) | |||||||||||||||||||
| Partner | Yuna Nagaoka (since 2023) Haruna Murakami (2022–23) Ikura Kushida (2021) | |||||||||||||||||||
| Coach | Dmitri Savin Fedor Klimov Sofia Evdokimova Mie Hamada Cathy Reed Satsuki Muramoto Hiroaki Sato | |||||||||||||||||||
| Skating club | Kinoshita Academy | |||||||||||||||||||
| Began skating | 2010 | |||||||||||||||||||
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Sumitada Moriguchi (森口 澄士, Moriguchi Sumitada; born December 29, 2001) is a Japanese pair skater. With partner Yuna Nagaoka, he is the 2026 Four Continents bronze medalist, the 2025 Asian Winter Games bronze medalist, the 2025 CS Kinoshita Group Cup bronze medalist, and a two-time Japanese national champion. He represented Japan at the 2026 Winter Olympics.
With former partner Haruna Murakami, he is the 2022 JGP Poland I bronze medalist and the 2022–23 Japan national champion on both the senior and junior levels.