I live in Japan and I’ve encountered some pretty wild versions of history from students, but I haven’t run into that one yet.
Here’s the view of 20th century history that I find it most common in Japan:
“In the 1930’s, Japan was expanding its colonial sphere of influence just as England, France, the US, and other colonial powers had been doing. Since this was unpopular in Europe, Japan had to ally itself with Germany so that it could enjoy the same imperial rights the Europeans had been enjoying for centuries. To provide a pretext for attacking Japan, Roosevelt allowed the Japanese Navy to attack Pearl Harbor. A couple of uninteresting things happened in the intervening years. Then, in 1945, when Japan was utterly helpless, the US dropped 2 bombs on them for no reason whatsoever. Many women and children died, and people still suffer the effects to this day. Today Japan is safe and secure from all external threats because of its peaceful attitude toward other nations.”
That’s a paraphrase of what they generally say about it. To be sure though, we Allies have not owned up to our own atrocities in WW2 such as the bombing of Dresden and other population centers in the war. And it’s true that the A-bomb was dropped for no other reason than it cost a billion dollars to build and had to be used, the US wanted Japan to surrender to the US only and without conditions, and Truman wanted to scare the pants off the Russians. We knew that Japan had no warmaking capability and that they were making secret overtures for peace to the Russians.