Summary:
Noto Sans fonts in Japanese have been become always large since 1.20.30, regardless of the font size setting. So, it's hard to see because symbols and characters to overlap(MCPE-173918) and going out of the background.

Steps to Reproduce:

1. If possible, open the game older than 1.20.30
2. Set language to Japanese
3. Change the font to Noto Sans
4. Type a text in the chat
5. Take a screenshot
6. Start up it 1.20.30 or newest
7. Set language to Japanese if it is other than one
8. Change the font to Noto Sans
9. Type a text in the chat
10. Compare it with the older screenshot

Expected Results:
These font sizes are exactly the same

Observed Results:
The font size since 1.20.30 is too big compared to before

Note:
This isn't affected on Mobile due to MCPE-177579

In pinned comments, there is a pack to fix the bug (only works on Windows).