Would have South Japan and North Japan Divided instead West Germany and East Germany?
The Red Navy didn’t have the capabilities to launch an amphibious invasion of the Japanese Home Islands at this stage so no division of Japan between north and south. Best case scenario for the Soviets is that they receive South Sakhalin (as per OTL) and get basing rights for their troops and ships in Hokkaido.
IMO you get a poorer and more devastated Japan post-WW2.
Would have Anime, Manga and Light Novel Never Exist?
No clue, but weren’t anime and manga heavily influenced by comic books brought to Japan by American occupying forces? Something to think about.
Would Have Soviet Invaded Korea?
Almost certainly. Especially if the Western Allies are tied down with a bloody invasion of Japan Proper. Given how thoroughly the Soviets steamrolled the Kwangtung Army I see no reason they wouldn’t keep marching till they reached the Straits of Tsushima.
Would Kuomintang Won Civil War?
Not likely IMO. The KMT are screwed, what with a stronger Soviet presence in North China, and the Western Allies distracted with Downfall. Mao will receive even more territory and supplies when the Red Army eventually withdraws.