Communists caused Japan-China War!
Red China owe responsibility of War.
http://www.interq.or.jp/sheep/clarex/discovery/discovery01.html
Chinese communists had manipulated people to evoke hostility
against Japanese citizens and
the Nationalist Armies so that they got involved in armed conflicts
with each other.
All of the above were plotted by the Communist Party,
and any single case potentially could provoke war declared from Japan.
Obviously
Japan did not do that and continued to work hard to seek for peace making.
However, these Communist-backed terrorism acts ruined the hope for peace.
But remember that was what the communists wished to be.