Complex sentence: However, according to Japanese historian Saburo Ienaga, suppression in Japan was less severe than in other Axis countries, and yet organized resistance was still absent in wartime Japan.
Split into simpler sentences: However, according to Japanese historian Saburo Ienaga, resistance movements in other Axis countries faced suppression that was more severe than in Japan. Yet, according to Saburo, organized resistance was still absent in wartime Japan.