In fact, every time Japan goes out to expand the island, it is basically when the domestic contradictions are prominent and the distribution of benefits is difficult, it will shift its finger outward.

When you say "peaceful times", Japan is in an era of domestic economic prosperity and democratic movement. Correspondingly, most politicians who are active in politics advocate peace, democracy and freedom, and the whole society is not too enthusiastic about foreign wars. It was not until the American economic crisis spread all over the world that Japan was hit hard. The massive destruction of the Great Hanshin Earthquake caused Japan to fall into depression instantly, which led to the large-scale rise of hawkish conservative forces represented by the military department, which crowded out the civil affairs, doves and leftists on a large scale, and finally led to the invasion and expansion of 193 1.