Useful how may I ask?
Japanese is nice and all but I would say it's not very useful at all unless you have personal plans for japan. One could even argue it's not useful for learning for manga and anime since subs and subs exist
DJT - Daily Japanese Thread #2481
Nathaniel Rodriguez
Thomas Flores
Useful for ME because of the media I like, like video games, anime, even Zig Forums, which has many images with Japanese text in them.
I'm pretty sure I encounter it more often than Spanish or French or whatever the alternatives are.
Plus they have a pretty unique but nice culture and getting to know cultural differences makes you a more understanding person.
Dominic Williams
Learn Japanese instead of replying to someone that will never learn it