The Japanese language does not include swear words.

‘Perhaps profanity’s ascendancy will eventually bore people into finding new and more interesting ways to express themselves. For now, however, anyone hoping to escape the triumph of what was once called “gutter talk” should either lance hie eardrums or consider relocating to Japan.’

— “Salty Oaths and Bloody Words” by Dave Shiflett, WSJ, Books, Sat/Sun, Sept 17–18, 2016