There is no announcement of any over there:-
http://www.pentax.jp/japan/index.html
And it is confirmed at various Japanese sites and forums that Japanese Pentax users are talking about it is an overseas release, for example:-
http://digicame-info.com/2012/02/aps-ck-01-1.html
(Google translation here)
http://bbs.kakaku.com/bbs/K0000152652/SortID=14100844/
(Google translation here)
So, did Ricoh actually know and decide that there would be no market and little demand of the K-01 at their home so that they have not launched it in Japan? :-o