>>216350580
>>216350547
>>216350160
(3/3)
>Japan
Japan number one since it has the richest culture and history. While Korea has it beat music wise and probably film wise, Japan still has a respectable catalog that dates back way further than Korea (Korea’s history ends around the 80s since Japan tried to conquer them and erased a lot of history).

There is video games, manga, film, TV, endless niche interests, fantastic place to travel to, 2.5x size of Korea’s population, etc. there is bound to be some entertainment value you get from knowing Japanese. Japan is the good middle ground inbetween China and Korea. China is huge but not as good culture, Korea has some better culture but in smaller quantity. Japan you get the medium size country and endless culture to explore. But they are also dookie fertility wise. Will probably be fine for our lifetime but maybe not the best for future proofing. But for right now, there is plenty of reason to know it, and endless things to go back in time with Japan media wise.