Advertising and Affiliate Disclosure

これは法的な告知であり、すべての訪問者に同一の文面が適用されるよう英語で記載しています。対象となる学習コンテンツはお使いの言語でご利用いただけます。

How this site is paid for, stated plainly, so that you can weigh what you read accordingly.

Last updated: 26 September 2026

Advertising

This site is free and may display advertising to cover its running costs. When advertising is enabled, the ads are served by third-party networks, and the site's author does not choose the individual ads and does not know in advance which ones will appear. If you see an ad that is misleading or offensive, please report it to the address on the contact page.

Advertising does not influence what this site teaches, which places it recommends, or what it says about them.
No advertiser has been given editorial input, and payment has never been accepted for a favourable mention.
Ad units are placed so that they do not interrupt the material they sit beside.

Affiliate links

There are currently no affiliate links, referral links or sponsored placements anywhere on this site. If that ever changes, the affected page will say so on the page itself, not only here.

Data

What is stored in your browser, and what is not collected at all, is set out in the privacy policy.