This is needed for M5 to send Japanese mails.
Currently there is no way to verify this bug because of the blocking Bug 5525, which prevents any Japanese text from being sent.
** Checked with 5/3/99 Win32 M5 candidate build ** The blocking bug 5525 has been resolved. Japanese mail send is now going out in iso-2022-jp. In that sense this bug should be marked verified. But we are using a wrong JISX0208 escape sequece for Shift-in. See Bug 5893. Since at least one kind of encoder is working,I'll mark the fix verified.