Note: The site is entirely in Japanese. Use your browser's translate function if needed.

(Use with caution)

: The official physical workbook often includes a 35-page separate volume containing the answers. If you bought your book used, this insert might be missing.

Having the answer key is useless if you use it as a crutch. The entire point of Kaite Oboeru is active recall. Here is a to maximize the answer key: