Hasegawa 's research also includes the Japanese history of the Russian Revolution of 1917 and Soviet -- political and social relations . Hasegawa 's research also includes the Japanese history of the Russian Revolution of 1917 and Soviet -- political and social relationships .
Penyelidikan Hasegawa juga merangkumi sejarah Jepun Revolusi Rusia 1917 dan hubungan politik dan sosial. Penyelidikan Hasegawa juga merangkumi sejarah Jepun Revolusi Rusia 1917 dan hubungan politik dan sosial.