I’ve updated the foreign editions page to reflect the fact that the series of Japanese translations of Ruth Chew’s books has hit 21 volumes as of April 2015.
I only have the first nine, but apparently it’s possible to shop on Amazon Japan in English, buy with any credit card, and get international shipping, so that situation is temporary. Luckily, even the ones from back in 2010 still seem to be available.
Twelve more books I am completely not able to read, soon to be mine!
To be fair, I did understand the three words of the title of one of them (Witch’s Cat). I know slightly more than absolutely zero Japanese.