| Sumitada Moriguchi | ||||||||||||||||||
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 Murakami/Moriguchi at the 2022–23 Junior Grand Prix Final | ||||||||||||||||||
| Native name | 森口 澄士 | |||||||||||||||||
| Born | December 29, 2001 Uji, Kyoto, Japan | |||||||||||||||||
| Hometown | Uji, 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 | Bruno Marcotte, Mie Hamada, Brian Shales, 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 his partner Haruna Murakami, he is the 2022 JGP Poland I bronze medalist and the 2022–23 Japan champion at both the senior and junior levels.