The Shaman King Kang Zeng Bang volume reprints are becoming very rare in Japan right now.

At online retailer, bk1, several volumes are currently out of stock. These are volumes 1, 25, and 26. Volume 27 at time of article is on sale and not yet out of stock.

At worldwide online retailer, Amazon.co.jp, even more books are out of stock. Volume 24 is on order from the publisher, volumes 1, 4, 25, and 26. Volume 27 when it first went onto Amazon.co.jp it reached within the top 25 book sales for the day (not just manga, but all books in general). Right now, Amazon.co.jp has stopped accepting pre-orders as they have reached their cap that they will receive from Shueisha.

The Ultimate Kang Zeng Bang Guide will be updated with more information as it becomes discovered. Shaman King Kang Zeng Bang volume 27 is currently on sale in Japan now, but these preliminary sales figures show that this will be a very successful volume in terms of sales.