This book has seen very limited distribution. I have seen none for sale from the customary new or used sources, and the only place I know that it can be found is in the states, at http://www.shindokanbooks.com/shugyo.shtml
Perhaps you can cut the cost of shipping by ordering several copies for you and your mates, and splitting the combined shipping costs.
It is a good read, though. I have a review up in the Aikido Journal bibliography section.