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- International Ninja Federation / 国際忍者連盟
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- JR Kusatsu Line, Ninja Train "SHINOBI" debut
- Declaration of Ninja City
- Feb.22. THE OFFICIAL NATIONAL NINJA DAY
- Ninja appears in city hall
- Chicken Attack
- Sanada Ninja vs Judo
- Ninja City, debut!
- Contemporary Ninja Style ─ ─ Y-3 Fall Winter Collection 2017
- Kimono cosplay costumes such as ninjas and samurai popular with foreign tourists
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