I've tried messaging them 3 times through the link on their site with no reply, have you managed to successfully order one?
I messaged them on Feb 28th and just got a reply from them:
Dear Mr.Daniel Collins
This is Tatsuya Ishida who is charge of the manager of Ohrai Noriyoshi
Exhibition The Illustrator.
We sincerely apologize for the delay in my reply to you.
Your email was sent to our
holder.
We are having our specialists look into the problem and will get back to
you as soon as we find a solution to it.
We are delighted to know that you are interested in our exhibition and
catalog.
We have accepted your order for a catalog.
We would like to send the quotation within one week.
Please kindly wait for a while. Thank you for your patience.
Sincerly yours,
Tatsuya Ishida