- Title: Labyrinth of Natural Heritage - Author: Mototaro Kagawa - Publisher: PHP Institute - ISBN: 978-4-569-68645-1 - Price: 1,300 yen Thank you for viewing. This is a valuable signed book by Mr. Mototaro Kagawa, left before his passing, and it is new. This item is currently difficult to obtain. I am still hesitant to list it, so please be aware that I may remove it suddenly. It was new and unopened, carefully stored in a plastic bag. It was opened for the photos this time. The condition is extremely good, but as it is a signed book that has been in the author's hands once, please refrain from purchasing if you are looking for perfection.