He kept asking for promises but I never gave him any.
He almost had to vacate the mainland coast to stop Germany from over whelming him. As for Tokyo, that was not so much abandoned since he didn’t have a way to get his forces off Japan. His fighters were already in Russia stopping Germany from taking Moscow. It was a catch 22. He could let Germany win by evacuating Russia to protect Tokyo, or he could have a better fight against America. America only won because I lucked out and got into that bottom 22% where the attacker actually survived. He still had about an 80% chance to win, though, I had the forces to do a second attempt later if I wanted too.
Germany, on the other hand, was telling his ally to not only give up Asia so he could take it but to suicide his planes into America and hope enough hit that the American navy would be set back a round or two. Not a very good move, IMHO, since the suicide fighters still had a 33% chance of missing EACH and you had to pre-declare all your targets, so you couldn’t even see if the fighters you sent after a specific boat actually HIT that boat before declaring the next one. That means you’d have to dedicate 4 fighters to sink a battleship, 2 to sink a carrier, etc. You could send half that much, but you’d be relying on luck.