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