Affiliate disclosure
How the bookstore and tutoring links on this site work, in plain terms.
The links
Some outbound links on this site — to bookstores and to tutoring platforms — are affiliate links. If you click one and buy the book, we may earn a small commission. It costs you nothing extra — the store pays it out of its own margin.
As an Amazon Associate (Amazon.com and Amazon.co.jp) we earn from qualifying purchases.
Why this doesn't bend the recommendations
Commissions never affect what we recommend. The simplest evidence is that our guides routinely tell readers which volumes to skip, links and all. A commission is broadly the same whichever book you choose, and nothing when you sensibly choose none. The evidence boundary behind recommendations is covered on the methodology page.
About the prices
Prices shown on this site are publisher list prices — Japanese cover prices before tax (本体価格), as printed on the book and verified against National Diet Library records. They are not the price any given store will charge you — import stock, shipping and exchange rates all move the final number. Treat our prices as a way to compare books, not as a quote.
Stores and services currently linked
| Amazon.com | US / international |
|---|---|
| Amazon.co.jp | Japan |
| Bookshop.org | US · supports local bookstores |
| White Rabbit Japan | ships worldwide |
| CDJapan | ships worldwide |
| italki | online tutoring |
| Preply | online tutoring |
Last updated August 2026.