The Japanese also have a phonetic writing system, kana, which is at least as old as Hangul. But so much useful context is lost when writing in pure kana rather

The Japanese also have a phonetic writing system, kana, which is at least as old as Hangul. But so much useful context is lost when writing in pure kana rather than the standard writing system (a mix of kana, Chinese characters and, occasionally, Latin text) that it's not really used exclusively unless context requires it (children's books, old video games, etc).