bedrock edition does not use the original Minecraft font for Japanese, which causes the UI to be corrupted and some characters to not display correctly.
This problem is also a cause of headaches for Japanese creators, and we believe it is the reason why there are fewer Bedrock Edition creators in Japan than in Java.
To fix this problem, it is necessary to apply the ttf fonts in the resource packs that are included by the host to the client side as well, to make fonts that support Japanese like Java's the default, and to modify the fonts that are currently being used.