> When I input Japanese like below:
> 
> term% 日本語の入力の練習です。<cr>
> 
> 
> I cannot now return to rc shell.

I don't understand.  Do you want just to enter one line of Japanese text?
The idea was to switch the mode of /dev/cons permanently. I assumed
your Japanese input methods could provide both ASCII and Japanese text.
The pipefile program is a permanent fixture, not useful for just sending
one line and going back to the previous state.

-rob