>>213443492 (OP)
>implying you will learn either of them
Still, Japan would be much nicer to visit (until they get real sick of foreigners and decide to [rightfully] genocide them). There is more content to enjoy in Japanese, really the only language besides English with a *ton* of neat shit to read/watch/play. Japanese culture is really interesting and based.
China will help you get a job chinkwrangling. There is no shortage of weeaboos that speak Japanese, so it's a way more desired skill. Only a handful of autists learn it to jobmax, nobody else really gives that much of a fuck about China.