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The original was posted on /r/todayilearned by /u/gullydon on 2025-07-05 10:34:26+00:00.

Original Title: TIL Keiko Fukuda, a Japanese-American martial artist, was the highest-ranked female judoka in history. She became the first woman to hold the rank of 9th dan and is also the first and, so far, only woman to have been promoted to 10th dan in judo.