MacOS : No Japanese input method I have added Japanese as a favourite languages in preferences : 



However, in the Input Methods panel, the Japanese input method seems to be missing : 



How can I fix that / add the Japanese IME ? 

Note : I don't want to install Google's or Mr.third party's Japanese IME. I want to enable Apple's native Japanese IME.
It's a common problem.  Try a Safe Boot.  If that doesn't work, try the fixes in Apple's article on the topic.  See this page.