Seo for Japanese keyword?

Hello friends,
Recently I have started doing SEO on the Japanese keyword. And the problem I am facing is that when I do social bookmarking for that Japanese keyword it takes it as [ヤマト運輸]. Here the forum is converting the keyword correct but not in case of bookmarking. Please help me and let me know how to get out of this problem? And please suggest me some SEO techniques I should use for the Japanese keywords.
Suggestions are appreciated…
Thanks a lot for you
Please find the screen shot of my problem attached…

What is the code you encoded for the text on your website? Or could you give me the url of your website?

I think you should use only Japanese bookmarking sites.