Hiryu Niwa
As of 2026-10-12, Hiryu Niwa is ranked #359 of 688 active men in gi by The Grappling Index.
#359Gi rank
#577Overall rank
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<a href="https://grapplingindex.com/athletes/hiryu-niwa"><img src="https://grapplingindex.com/badge/hiryu-niwa.svg" alt="Hiryu Niwa — Grappling Index rank" height="76"></a>