Japanese keyboard isn't working

In KDE Settings - Inputs - Keyboards - Keyboards, I have: English, Japanese, Ukrainian. I have the input changer set to CTRL+SPACE. When I press CTRL+SPACE, it correctly switches between the three keyboards. However, the Japanese keyboard does not change to Japanese input; it only does alphabet input. The Ukrainian keyboard correctly inputs Cyrillic.

How do I get the JP keyboard to do JP?