Japanese character problem in mail subject line

Can anybody there please help me out?

I am having a problem with the display of Japanese character in the
subject line of the mails sent in Japanese language. This problem is
particularly with Hotmail Live and Yahoo Beta mails for rest all
like Gmail, Hotmail original and Yahoo original its working fine. It
may be some character encoding problem, but is there any way that I
can get rid of this issue.

.