How to enable japanese input in Ubuntu Mate 18.04?

Not much to elaborate on my side: how can I enable japanese input on ubuntu mate 18.04? I tried adding japanese language support and restarting. But I still don't see any viable keyboard layout to add.

Solution 1:

On Ubuntu 18.04, the way to install Japanese input:

• Go to system settings, select "Region & Language".
• Go to "Manage Installed Language" and install Japanese through "Install/Remove Languages". (you might need to log out and login after installation).
• After installation, inside "Region & Language" dialog, click "+" to add input sources. select "Japanese" > "Japanese (Mozc)".

That's it. You can select Japanese input on one of the button on top right menu.