メルカリ

Market position

Mercari became Japan's largest flea-market app and the first Japanese startup to reach unicorn status. A 2017 survey found 94% of Japanese users of community marketplace apps used Mercari, and monthly gross merchandise value in Japan surpassed JPY 10 billion. Press coverage in 2016 compared its trajectory with Yahoo! Auctions, then handling roughly JPY 800 billion annually, and described Mercari as a rival to Amazon.

Differentiators cited include a listing flow that takes roughly three minutes, anonymous shipping through carrier partnerships that hide names and addresses between users, escrow-style payment protection with mutual ratings, 24/7 in-house customer service, AI-based detection of prohibited listings, compensation for counterfeit or damaged goods and shipping accidents, a rights-holder protection programme for IP owners, and a product-safety notification service that alerts specific owners of recalled items.

Technology

The platform is a smartphone-first marketplace app for iOS and Android with an integrated logistics layer: in Japan, Rakuraku Mercari-bin (with Yamato Transport) and Yuyu Mercari-bin (with Japan Post) support anonymous shipping and drop-off at convenience stores and post offices; in the US, Mercari works with USPS, UPS and FedEx to let users print shipping labels. Mercari applies AI to automatically detect listings and transactions that violate its terms — for example game accounts, counterfeit brand goods and pharmaceuticals — combined with human review, an escrow-style payment system that protects both sides, mutual review ratings, and mandatory identity registration for sellers introduced in February 2019. In June 2026 the company enabled Mercari item search and listing preparation inside OpenAI's ChatGPT.

Go-to-market

The service is distributed as a consumer mobile app and website, promoted through television advertising (TV CM campaigns began in May 2014 and continue, with a new spot launched in August 2026), sponsorships including Kashima Antlers matches, community events such as the Mercari Trading Card Cup Pokémon tournament, and promotional campaigns including discount coupons tied to Mercari Mobile subscriptions. A dedicated English-language Mercari Japan storefront targets overseas buyers of Japanese pop-culture goods.

Individual consumers in Japan and the United States who sell unwanted items or hunt for secondhand and hard-to-find goods, plus overseas buyers of Japanese pop-culture merchandise such as trading cards, figures and idol goods.

Geography

Headquartered in Minato, Tokyo. Wikipedia lists areas served as Japan, Taiwan, the United Kingdom and the United States. A San Francisco office opened in 2014 ahead of the September 2014 US launch, followed by Palo Alto and Portland offices employing around 100 people; a London office opened in January 2016 and the European branch was dissolved in December 2018. The group also includes Mercari Software Technologies India Private Limited.

History

The Mercari app launched on iOS and Android in July 2013 and accumulated over one million listings within a year. Early financing came from East Ventures (JPY 50 million, July 2013) and United (JPY 300 million, August 2013). Fumiaki Koizumi joined in December 2013, and executives including Yuki Hamada, Ryusuke Matsumoto and Sotaro Karasawa joined in 2014. TV advertising began in May 2014, sales commissions were introduced, and the US launch followed in September 2014 after a San Francisco office opened. Mercari invested in BASE in January 2016, opened a London office in January 2016, and raised roughly JPY 8.4 billion in March 2016, bringing cumulative funding to about JPY 12.6 billion. It acquired Zawatt (February 2017) and Michael (October 2018), hired John Lagerling from Facebook as Chief Business Officer in June 2017, and withdrew from Europe in December 2018. Mercari is now listed on the Tokyo Stock Exchange (4385).

Risks & controversies

The company has faced circulation of prohibited items on the platform — counterfeit goods, stolen property, game accounts and pharmaceuticals — prompting AI detection, mandatory seller identity verification from February 2019, cooperation with investigative and public agencies, and participation in industry bodies such as CIPP and the EC Operators Council. Its European expansion was unwound: after opening a London office in January 2016, Mercari announced in December 2018 that it would dissolve the European branch as a "temporary retreat" amid mounting losses.