Thank you very much for this porting of Rikaichan. Is there any chance you port Rikaichamp for THUNDERBIRD too ? That would be great to say the least, and I'll probably make a donation if you do so.

I've been working in Japan in a Japanese company for a long time and Rikaichan for Mozilla Thunderbird helped me A LOT. I recently updated Thunderbird just to realize that Rikaichan wasn't supported anymore. Please HELP !
PS: I tried getting the xpi file after adding the extension to Firefox and then import it into Thunderbird. While the extension is properly listed and shown as compatible in Thunderbird, it actually doesn't seem to work :/

EDIT: Thank you for the answer and happy new year :) I hope you or someone else can do something about it. Unfortunately I'm not into software dev :( If it takes less than 6 months it would be awesome !