Background & Biography
Fujimoto's public account of entering cryptocurrency begins with the cost and complexity of moving money for social purposes. In an Iolite interview, she described work in education and an encounter with Bitcoin while exploring international donations. She later established Gracone and developed KIZUNA, bringing together business development, public communication and charitable use cases. This account explains her stated motivation without requiring assumptions about her private finances or attributing every outcome of a partner organization to her.
KIZUNA's own history dates its cryptocurrency-donation platform to 2017 and a broader blockchain-and-social-impact role to 2020. Its team biography identifies Fujimoto by both her name and the Miss Bitcoin public identity. Binance independently documented its own appointment of her as a Binance for Children ambassador in April 2019. That announcement verifies a specific relationship at a specific time; it is not evidence that she managed Binance or all of its charitable programs.
Her move into protocol entrepreneurship also has an independently documented geographical basis. Swissinfo reported in December 2022 that she had established Ryodan Systems in Lucerne in May 2021, discussing why she chose Switzerland for the business. The currently available Tech for Impact Summit biography and WebX's 2026 biography both describe her as Switzerland-based. This profile therefore uses Switzerland as her professional base and Japan as another central market, without substituting company registration for personal evidence or making a nationality claim.
The current titles need to remain distinct. INTMAX's mainnet announcement names Fujimoto alongside Leona Hioki as a co-founder. zERC20's July 2026 announcement identifies her as its CEO, while 2026 conference materials also confirm her co-founder status. The Japan Blockchain Association's February 2026 event report calls her an INTMAX and Japan Blockchain Week co-founder and a JBA adviser. Those roles describe entrepreneurship, convening and advice, rather than authority to set Ethereum protocol rules or Japanese government policy.
Notable Contributions
Fujimoto's charitable work helped put cryptocurrency in front of organizations outside trading markets. KIZUNA describes connecting nonprofit organizations, sharing donation examples and helping participants explore practical blockchain applications. Binance's 2019 ambassador announcement places her within a named campaign supporting its charitable initiatives. The relevant contribution is this work of coordination and translation: a digital transfer becomes useful only when the recipient can understand, receive and apply it. Aggregate charity totals should not be treated as Fujimoto's personal donations or independently verified individual impact.
INTMAX represents a more direct infrastructure venture. Ryodan Systems announced its Ethereum mainnet launch on June 26, 2025, identifying a stateless, privacy-focused payment system and naming both co-founders. Fujimoto's accompanying statement emphasized accessible transaction costs, control over assets and privacy. The launch is a concrete milestone beyond a research proposal. It does not, by itself, establish sustained payment adoption, universal privacy guarantees or the commercial success of applications that may use the system.
The technical contribution has a clear attribution boundary. The Intmax2 research paper names Erik Rybakken, Leona Hioki and collaborating researchers as authors, and describes shifting substantial data and computation to users while minimizing the information placed on the underlying blockchain. Fujimoto is not listed as a paper author. Her profile should recognize founding leadership and public articulation of the project's purpose without turning those activities into a claim that she personally invented its cryptography. The research also makes user-side data handling an important part of assessing practical usability.
zERC20 addresses a related but separate problem: adding privacy functionality to existing token ecosystems. In July 2026 it announced zJPYC on Kaia, describing a sequence in which users wrap JPYC, send the wrapped token and redeem it back. Kaia's subsequent quarterly update corroborated the deployment. The distinction between the underlying yen-denominated token and the privacy service is essential: zERC20 explicitly states that zJPYC is independently provided and is not a service endorsed, reviewed or jointly developed by JPYC Inc. Fujimoto's role is leadership of the privacy project, not issuance authority over JPYC.
Her community work remains relevant alongside these products. JBA documented her role hosting its 2026 meetup, providing current evidence of participation in an industry-wide forum. The Japan Blockchain Week website also lists her in the 2026 program, and external event biographies describe her work connecting Japan with international blockchain communities. This gives her a channel for explaining technical projects to broader audiences and bringing different participants together. It does not mean those audiences or institutions have approved every product she represents.
Why Katharos.ai Follows Mai Fujimoto
Katharos.ai follows Fujimoto because her career links three questions often discussed separately: why people need digital payments, how privacy infrastructure is built into those payments, and how non-specialists gain access to it. Her movement from donation initiatives to protocol and middleware entrepreneurship creates a useful perspective on practical adoption. The evidence is strongest when it identifies a specific role, a deployed service or a documented event. General visibility, conference attendance and broad partnership language are weaker measures of lasting influence.
Her work also makes the difference between privacy as a principle and privacy as an implemented service especially visible. Users need to know what a system conceals, what actions are required for that protection and which organizations remain responsible for the underlying assets. The zJPYC announcement, for example, says the complete send-and-redeem process matters; simply holding a wrapped token is not an equivalent privacy claim. Following these operational details gives a more useful picture than repeating blanket descriptions of a project as private or secure.
Areas to Follow
- Evidence that INTMAX's deployed payment infrastructure is being used consistently, including the quality of wallet recovery, user-side data management and ordinary payment workflows. - zERC20 integrations, with deployment status, supported assets and the conditions for privacy verified separately for each network. - Clear communication about the distinction between zERC20's wrappers, stablecoin issuers and any independently operated applications. - Fujimoto's ongoing role connecting Japan and Switzerland through public events, industry advice and product partnerships, with policy participation distinguished from regulatory authority.
Reporting Scope
This profile covers Fujimoto's public professional activities and the organizations relevant to them. It distinguishes historical charity appointments from current business titles, research authorship from founding leadership, and a product announcement from measured adoption. Conference biographies disagree on the exact starting year of Japan Blockchain Week, so no single founding year is asserted here. No private holdings, wealth estimates, personal relationships or unverified educational credentials are included.
Areas of Influence
Investment & Founders captures Fujimoto's leadership of blockchain ventures. Exchanges & Infrastructure and Stablecoins & Payments reflect INTMAX's payment architecture and zERC20's work with existing tokens, without labeling her a stablecoin issuer. Community, Media & Education reflects KIZUNA, public communication, Japan Blockchain Week and industry convening. Her JBA advisory role adds an industry-policy connection, but is not treated as a government or regulatory position.
Katharos.ai publishes this profile for information, based on the sources listed. Inclusion is not an endorsement of the individual, their organizations, or any investment product.
Source notice: Information and images are attributed to the external sources listed. Katharos.ai does not endorse the subjects or claims described and does not independently certify the authenticity of every source statement or image.