Editorial Policy

Verification

• Calendar entries are added only after checking the official circuit or organiser page, which is linked on every row, with the verification date shown.
• Dates that are not yet announced are marked TBA — we never guess.
• Market prices cite the source and the date observed. Prices in Japan move; the "last verified" date tells you how fresh a number is.
• Mistakes get fixed, not hidden — corrections are noted on the article.

Our services and our independence

TSUISO operates two paid services: drift trip support and car search & export coordination. This site exists partly to earn that business. Our rules for keeping the content honest:

• Event and track information is published identically whether or not you use our services.
• We do not accept payment from circuits, organisers or exporters for placement or favourable coverage. Any future sponsored content will be clearly labelled.
• Where we recommend third parties (shops, exporters, schools), the recommendation is based on reputation and our own experience, not commission. If a link ever pays us, we disclose it on the page.

Safety and legality

Drifting belongs on circuits. We do not publish guides to street drifting, and we cover touge history as history. Follow each circuit's rules — they are the reason these places still exist.