WC Dev,
If interested, I'd be glad to work on the localization of WeatherCat to Japanese. It might be a little challenging to translate some of the weather terms, but I think this would be fairly easy given that I've been in Japan more then 20 years, and my wife is a professional translator.
By the way, I'll be generating both English and Japanese pages once WeatherCat has the support for multi-byte UTF-8 characters.
Let me know...
JAG