MacPerl: Power and Ease is now available in Japanese!
The translation was published in early 1999 by ASCII Books.

Here are the relevant ordering details:

MacPerl: Power and Ease (Japanese Edition)
Vicki Brown, Chris Nandor
ASCII Books, 1999

ISBN 4-7561-3068-2, Y4600E

ASCII Books:  www.ascii.co.jp

MacPerl: Power and Ease:

www.ascii.co.jp/books/detail/4-7561/4-7561-3068-2.html