I have confirmed that these files are inside the Kagura Compatibility folder. Go and copy the 'Data' folder inside a fresh download of the Kagura Compatibility folder, and paste it into the game's base folder. You should get a single overwrite request if you are doing this on a fresh copy of the game. If you go inside the Data folder of the base game after following all the steps, you should see something like this:
This mod actually has JP support fully added without any extra downloads. Simply open the game and click on the 'language icon' in the bottom left corner to switch to JP.
Yes, this is an issue with Kagura's chosen font that I never noticed until a few days ago since I don't use their poor font when testing. However, I have found a workaround to get these symbols to load in both 07 and Pixelify, so that will be fixed in the next update.