Russia is currently under a condemnation resolution from the United Nations.

In the past, Japan withdrew itself from the League of Nations (1933).

Russia is under economic sanctions, but it is the world's energy resource producer and China is a (de facto) ally.

In the past, Japan was also subjected to economic sanctions from all over the world (100% economic sanctions since 1941).

In addition, our country's energy production was only about 10%, and our only allies were two European countries (Germany and Italy), neither of which was an energy supplier or had transportation routes that could accommodate energy (*).

(*)To my surprise when I looked into this issue, it seems that Japan was producing quite a bit of crude oil at that time.

-- Yet, the people of our country at that time endured four years of war

If it had not been for the air raid on Tokyo, if it had not been for the atomic bombings, if it had not been for the Soviet Union's unilateral abrogation of the peace treaty -- maybe they would have endured for a longer period of time, I think.

Incidentally, public disillusionment with the war occurred only in the last six months of the war, when air raids began to become more frequent, and until then, government approval ratings had been relatively favorable.

Support for government during war is "high" -- this is pretty much common knowledge (e.g., suicide rates improve horribly).

Japan lost the war, but Vietnam was fought for 20 years and finally won against the U.S. Cuba has been under economic sanctions since 1960 and is still enduring them.

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I think you should do your own research and think for yourself about the "Russian invasion of Ukraine" instead of just receiving one-sided views from the mass media.

I have looked into this issue from the perspective of "comparisons with our country's past wars in the Pacific," but I am sure there are many other approaches.