Heloo, MooToolers.
I did translate MooTools 1.2.1 API DOC to Japanese. http://takahashifumiki.com/topics/web/mootools It's part of my blog and under construction(ofcourse, translation complete). I'm so sorry for that.... But I hope it'll be helpful. If you are familiar with Japanese and tired of reading foreign language, just try this. Bye.
