All 47 local federations and the Japan University Triathlon Union are affiliated with the Japan Triathlon Union (JTU); they are also members of the Prefectural Sports Associations.
Hokkaido Triathlon Union (HTU) |
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Aomori Triathlon Association |
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Iwate Triathlon Association |
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Miyagi Triathlon Association |
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Akita Triathlon Association |
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Yamagata Triathlon Association (YTA) |
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Fukushima Triathlon Association |
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Ibaraki Triathlon Association |
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Tochigi Triathlon Association |
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| Gunma Prefecture Triathlon Society |
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| Saitama Triathlon Union (STU) |
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Chiba Triathlon Union (CTU) |
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Kanagawa Triathlon Union |
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Yamanashi Triathlon Union |
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Tokyo Metropolitan Triathlon Union (TMTU) |
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Niigata Triathlon Union (NTU) |
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Toyama Triathlon Association |
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Ishikawa pref. Triathlon Association (ITA) |
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Fukui Triathlon Association (FTA) |
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Nagano prefecture Triathlon Association (NTA) |
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Gifu Triathlon Union (GTU) |
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Shizuoka Triathlon Association (STA) |
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Aichi Triathlon Association (ATA) |
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Mie Triathlon Association (MTA) |
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Shiga Triathlon Association (STA) |
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Kyoto Triathlon Association |
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Osaka Prefectural Triathlon Association (OPTA) |
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Hyogo Triathlon Association |
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Nara Triathlon Association (NTA) |
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Wakayama Triathlon Union (WTU) |
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Tottori Triathlon Association |
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Shimane Triathlon Association |
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Okayama Triathlon Association |
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Hiroshima pref. Triathlon Association |
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Yamaguchi Triathlon Union |
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Tokushima Triathlon Association |
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Kagawa Triathlon Association (KTA) |
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Ehimeken Triathlon Association |
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Kochi Triathlon Union |
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Fukuoka Triathlon Union (FTU) |
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Saga Prefecture Triathlon Association |
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Nagasaki Triathlon Association |
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Kumamoto Triathlon Union (KTU) |
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Oita Prefecture Triathlon Union (OPTU) |
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Miyazaki Prefecture Triathlon Union |
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Kagoshima Prefecture Triathlon Association |
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Okinawa Triathlon Union |
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Japan University Triathlon Union (JUTU) |
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