User blog comment:Jazon Naparleon/Questions of Romans and Mongols/@comment-32656-20120818212902

1. Little to no change.

2. What people usually miss is that the Japanese were holding them off until the storms screwed the Mongols entirely. The Samurai were, in fact, beating the daylights out of them - they were just heavily outnumbered. And, in Japan, usual Mongol tactics were worthless. Best they could have done would have been to take some of the lowlands. Japanese eventually force them out.

3. No.

4. Debatable. Either the lack of a unifying factor kills it faster, or the lack of the strife from its rise makes it stay until the invasions arrive like in otl. Won't survive into more of a present time.