A civilian trains to throw Molotov cocktails to defend the city, as Russia's invasion of Ukraine continues, in Zhytomyr, Ukraine March 1, 2022. REUTERS/Viacheslav Ratynskyi TOKYO, March 2 (Reuters) - Keiichi Kurogi was one of dozens of men in Japan who offered to join an "international legion" to fight Russian invaders after Ukraine's President Volodymyr Zelenskiy called for volunteers. Kurogi, a