Sukkiri Wakaru Eisei Kanrisha Dai 1-shu Text & Problem Collection 2025 Edition by Reiko Horiuchi / Author, TAC Eisei Kanrisha Course / Editorial Collaboration I used this for about half a month leading up to the September 4th exam, but I only used it to refer to areas I didn't understand in past questions, so it's relatively clean. It's a reference book combined with a problem collection, making it easy to understand. I think that if you use this book and do a few past questions, even busy people can pass without difficulty in about a month. When I bought it, I noticed that the top of page 104, Chapter 3, "Health Manager," was slightly warped, but I continued to use it as is, so I'll mention it as a point to note. If you don't mind, please consider it. Also, I am selling it on other sites, so I apologize if it sells out.