Privacy

Itte Dojo ("this site") is a free practice site run by an individual.

What is stored

Your moves, settings, recent results, puzzle progress and practice positions are stored only in your browser (localStorage). Nothing is sent to the operator's servers. Clearing your browser's site data removes them.

Accounts and cookies

There are no accounts or logins, and no cookies.

Playing a friend

For online games, the room's moves, clock, display names and stamp history are stored on this site's server (Cloudflare) and deleted two days after the last activity. Your display name is visible to your opponent, so use a nickname. Only people who have the room link can join.

Usage statistics

To improve the site, anonymous counts are sent to this site's own server (Cloudflare): page views, games started and finished, the grade of each graded move, puzzle answers and opening-drill runs (correct or not), rank-exam and Master of the Week results (which Master was played), rank-check results (the rank level and the number of right answers), and how many times the position analyzer was run (the position itself is not sent). What is sent is the page, language, referring site name, grades and whether the screen is phone-width or wider (only these two classes; never the screen size or device model). Names, email addresses and the moves of your games are never sent. IP addresses are not stored; to count visitors, only an irreversible code made with a secret that changes every day is kept. To leave automated visits out of the totals, the visitor's country and network number (the number of the provider or cloud company, which does not identify a person) are also kept. Nothing is sent if your browser has Do Not Track enabled. Only the operator sees the totals, except that the daily puzzle shows, for the latest day (Japan time) on which anyone tried that puzzle, how many players tried it and the share who solved it on the first try (combined numbers only). Because the visitor code changes every day, only that one day is counted and tries on other days are not added. When fewer than 5 players tried it that day, the share is not shown (and not sent by the server).

Hosting

This site is served by Cloudflare, which may process technical records such as IP addresses in the course of delivery. See Cloudflare's privacy policy. Text is rendered with Google Fonts, which are fetched from Google (Google's privacy policy).

Changes

If advertising is added or what is counted changes, this page will be updated first.

Effective: October 5, 2026
Updated: October 6, 2026 (country and network number added)
Updated: October 27, 2026 (screen-width class added)
Updated: October 31, 2026 (Master of the Week games added)
Updated: November 5, 2026 (how the daily puzzle's results of everyone are counted)
Updated: November 6, 2026 (rank-check results added)
Updated: November 12, 2026 (position analyzer runs added)