Sansan operates Japan's dominant cloud business-card management platform, scanning paper meishi (business cards) into a structured contact database that is shared across the customer organisation. Founded in 2007 by Chika Terada, the company turned a uniquely Japanese pain point, the elaborate ritual of business-card exchange, into a high-retention enterprise SaaS product.
The group operates two flagship services. Sansan, the corporate product, is used by more than 9,000 Japanese organisations including a substantial share of the JPX Prime constituency. Eight, a consumer-facing personal contact app, complements it. The company has expanded into sales intelligence, contract management (Contract One), and invoice digitisation (Bill One) under the same shared contact backbone.
Sansan listed on the Tokyo Stock Exchange Mothers market in June 2019 and migrated to the JPX Prime tier following the 2022 market restructure. It trades under ticker 4443.T.
The company is widely studied as a case of a vertical SaaS that built around a culturally specific workflow (business-card exchange in Japan) and used the resulting data graph as a moat to expand horizontally into adjacent enterprise software categories.
Sansan offers a clean lens into how a vertical Japanese SaaS company graduates from venture-stage KK to JPX-Prime listco, and into the corporate-structure choices that decision involves.
KK from the outset. Sansan was incorporated as a Kabushiki Kaisha in 2007. The founders never had to convert from a GK because they planned for a domestic listing from early on. For any founder serious about a JPX listing path, this is the cleaner sequence: incorporate as a KK at the Tokyo Legal Affairs Bureau, adopt the audit-committee governance model, and avoid the conversion paperwork later.
Mothers-to-Prime: the standard route. Sansan listed on Mothers in 2019, the high-growth tier of the old TSE. The 2022 JPX restructure folded Mothers into the new Growth segment, but Sansan met Prime thresholds and migrated up. Prime requires a tradable market cap of at least 10 billion yen, at least 800 shareholders, a 35 percent free float, and full English-language disclosure.
The Mothers-to-Prime migration is now the canonical path for successful Tokyo SaaS firms, with Mercari, freee, Money Forward, and Sansan all having walked it.
Statutory auditor versus audit committee. Sansan adopts the company-with-audit-committee model. Under the old default, every large or listed KK had to appoint a kansayaku (statutory auditor) sitting outside the board.
Reforms in 2002 introduced the company-with-three-committees option, and the 2015 Companies Act amendment added the company-with-audit-committee option, which is now the preferred governance model for growth-stage Tokyo tech listcos. Independent directors carry audit responsibility directly on the board, which is closer to international norms and easier for foreign investors to read.
Only KKs can list on the Tokyo Stock Exchange. Sansan planned for a domestic IPO from early on, so it was incorporated as a Kabushiki Kaisha at the Tokyo Legal Affairs Bureau and never had to convert from a GK. Any GK that wants to list must convert to KK first, which is a notarial process best avoided by incorporating as a KK from day one.
Prime is the top JPX tier and requires a tradable market cap of at least 10 billion yen, at least 800 shareholders, a 35 percent free float, full English disclosure, and adoption of the audit-committee or three-committees governance model. Sansan listed on Mothers in 2019 and migrated up after the 2022 market restructure once it met all Prime thresholds.
Yes. There is no general foreign-shareholder cap on Sansan. Japan does require pre-notification under the Foreign Exchange and Foreign Trade Act for large stakes in regulated sectors such as broadcasting, defense, and certain critical infrastructure, but enterprise SaaS is unrestricted, so any foreign investor can purchase shares through a JPX-connected broker.
The 2006 reform consolidated the old Commercial Code rules, introduced the GK as a new LLC-style vehicle, and abolished the 10-million-yen minimum capital for KKs and the 3-million-yen minimum for GKs. Today a KK can be incorporated with 1 yen of paid-in capital, although in practice 1 million yen is the working minimum and 5 million is required for a Business Manager visa.
