Thank you so much for posting this!
As for a non-Japanese user: I am able to open the application and the menus are in English for me. My machine was showing weird Unicode characters instead of Japanese characters. I had to go to my system config and change my Locale (language) to Japanese. Then my PC was able to read the Japanese characters and it worked.
I used your pre-set of characters. Do you think in the future, you will make more types of hairs, costumes, eyes, items, etc? I'm using that tool to generate NPCs for my game and it works like a charm!