Japanese books in Japan and Asia are the most comprehensive, because as long as they are sold in Japan, almost all of them are on them.

However, settlement in Japan and Asia requires credit cards supported by Japan and Asia, and some do not support overseas delivery. So you may have to buy it.

Find the original Japanese book you want to buy and ask the agent to buy it. For information about the original Japanese books, you can go to an official WeChat account called "Japanese Knowledge Sauce", which contains a lot of information about the original Japanese books. Now, a series of courses "10 minutes to help you read the original Japanese book" is introduced, and the contents of an original Japanese book are condensed into Chinese pronunciation of about 10 minutes, so that the essence of a book can be obtained without Japanese. Those who are interested can go and have a look.