This year marked 70th post-war anniversary in which for politicians to ask question what we learned from a lesson of World War II.
The question is all the more important in light of the Diet debate on Security Legislation.
Therefore I place my thought on why Japan-US war happened and how we should handle international politics in the future.
・Why did Japan-US War happen?
Why did Japan-US War (the Pacific War) happen?
Why did leaders at that time make a decision to engage in the war against the USA, even though superiority of US power over Japan was clear?
To consider this we need to focus US’s position at Sino-Japanese war since 1937.
It is a historical fact that the US was on the side of China at Sino-Japanese War.
Then the question is why Sino-Japanese War happened.
My opinion is that the War was mainly caused by the Manchurian Incident in 1931. Of course, Manchurian Incident did not necessary trigger Sino-Japanese War.
However I think that it is important to learn the process of history how Japan eventually led to Japan-US War after World War I terminated in 1918.
・The politics in the reality did not necessarily change only with idealism
The world common keywords after the World War I are outlawing wars and self-determination of people.
The politics in the reality did not necessarily change only with idealism, because each country tried to protect their own vested interests.
Probably it is true to a certain extent even today that real politics differ from ideal.
It is symbolized by the fact many colonies achieved independence only after the end of World War II under the slogan of self-determination.
There were Japanese people who gave up all the properties they had in Japan and went to Manchuria.
If they were requested to abandon properties in Manchuria and received violence, it is understandable that public opinion to save these people surged up, then.
Because of that Japanese government and military forces escalated war.
・Change international politics for ideal realization focusing on public opinion
Fortunately we can learn from the past history.
Thanks to invention of the internet and others, information spreads much faster than before.
This would make public opinion to support realization of ideals much easier.
Therefore we must have the recognition that time has come to change international politics, no matter how small it is, focusing on public opinion, while understanding real international political situation.
Keiichiro Asao, Member of the House of the Representatives