About
Independent Collector Research
Japan Pokémon Card Market Signals is a small independent research note for overseas collectors who want to understand Japanese listing language and weekly observed activity signals.
What This Site Does
The site studies a limited observed sample from Mercari Japan sold-out listing surfaces and normalizes Japanese listing titles toward identifiable Pokémon card candidates. It is designed to make the sample easier to read, not to act as a marketplace, price guide, or purchase tool.
This site is independent and is not affiliated with Mercari, The Pokémon Company, grading companies, proxy buying services, or marketplaces.
Editorial Independence
Weekly Signals rankings are based on observed listings, days seen, and the title-normalization rules described in Methodology. Editorial notes may explain classification uncertainty, but they do not change the ranking formula for a published week.
Nothing on this site is a purchase or investment recommendation.
Commercial Disclosure
This site is currently non-commercial. If we add affiliate links in the future (for example, to proxy buying services), they will be clearly disclosed on the page, and they will never appear inside Weekly Signals rankings or affect editorial decisions.