They are filled with beautiful diagrams and plenty of specifications that are easy to understand without being able to read Japanese. Using Google Translate on your phone will help with the text if you do not understand Japanese.
These books are no longer printed, and I paid well over my asking price and that does not account for shipping from Japan.
Please note, these books are completely in Japanese. I do not and cannot provide any sort of translation services.
These will be shipped via Media Mail due to their weight.