So that's me, you, and CanadianGoose... cm'on, Slamet, don't just leave us hanging here...
Matsuoka used that 'Moral Communist' thingy when he was negotiating with Stalin. He said that (citing his family; specifically his father) the idea of Communism had been handed down from fathers to sons from time immemorial. But now this moral value had been eroded by Western hedonist thinking. Having said that, Matsuoka also said that he did not believe in political and economic communism, just the 'moral' values.
Actually, Matsuoka proposed a non-aggression pact (24th March 1941) saying that the main barrier between Japanese and Soviet relations were the British (Anglos-Saxons). Then he wanted to buy Northern Sakhalin, saying that 2 million tonnes of oil could be extracted from there. Molotov responded saying "What, are you joking?"
Is 2 million tonnes of oil enough for the Japanese to pull through the US embargo?