Blockchain & Web3 Development Company in Tokyo

The regulatory surface a token build has to satisfy is what moves the number: a scoped Web3 proof of concept at Tokyo rates, a custom production dApp or tokenization platform, or full JFSA-grade exchange or Progmat-integrated security token platforms. Scope drivers include token design, a baseline smart contract, an audited testnet deployment, and a Japanese-language user flow. Tokyo rates sit above other Japanese cities because of the JFSA licensing complexity and the institutional client base. We give fixed-fee proposals in JPY rather than open T and M estimates.

The Payment Services Act treats crypto-assets as a regulated payment category. Any business that exchanges, brokers, or holds crypto-assets on behalf of users must register with the Financial Services Agency as a Crypto-Asset Exchange Service Provider, the same regime that licenses bitFlyer, Coincheck, GMO Coin, and SBI VC Trade. The 2023 stablecoin amendments added a separate license category for issuers and intermediaries of Electronic Payment Instruments, with banks, trust companies, and funds transfer service providers as the only eligible issuers. Our discovery phase runs a Payment Services Act classification on your token and your flow, and if you fall inside the licensed perimeter we coordinate with Japanese counsel on FSA registration. If you are building a utility NFT, an in-game asset, or a non-transferable token, you usually sit outside the perimeter, and we will tell you that clearly rather than overselling regulatory complexity.

Yes. Progmat, operated by Mitsubishi UFJ Trust and Banking, is Japan's dominant institutional tokenization platform and the de facto rail for security tokens issued by SMBC Nikko, Nomura, Mizuho, and major real estate sponsors. We build FIEA-compliant Electronically Recorded Transferable Rights (ERTR) issuance stacks that interoperate with Progmat's transfer agent and trust structure, deliver investor onboarding flows aligned with JSDA self-regulatory rules, and ship the disclosure documentation that the Tokyo Stock Exchange's ODX and Osaka Digital Exchange's START secondary markets require for listing. Custody sits with a trust bank as the law requires. We have patterned deployments after public Progmat issuances and stay current with the platform's evolving token standards, including the new MUFG Komainu and SBI Digital Asset Holdings tokenization rails when client preference dictates.

Oasys is a public, gaming-focused Layer 1 blockchain governed by a consortium that includes Bandai Namco, Sega, Square Enix, Ubisoft, double jump.tokyo, and other major studios. It uses a two-layer architecture with a Hub Layer for security and Verse Layers (game-specific L2s) for gas-free in-game transactions, which is the architectural answer to the wallet-friction problem that has killed most onchain games. For a Japanese studio, shipping on Oasys gets you discoverability inside the consortium ecosystem, a Verse Layer with sponsored gas, and editorial credibility with Japanese gamers who distrust unbacked crypto chains. We build Oasys Verse Layer game integrations, ERC-721 and ERC-1155 asset contracts tuned for Japanese consumer protection expectations, and gas-abstracted login UX using social auth and embedded wallets so non-crypto-native players never see seed phrases.

The Japan Virtual and Crypto assets Exchange Association is the FSA-authorised self-regulatory body for licensed exchanges. JVCEA rules cover token listing approval, segregated customer asset custody, cold storage thresholds, marketing restrictions, and incident reporting cadence after the 2018 Coincheck and 2024 DMM Bitcoin hacks. The Travel Rule, in force in Japan since June 2023, requires originating and beneficiary VASPs to exchange counterparty identification data on transfers above a defined threshold. Our exchange and custody engagements ship with JVCEA-aligned listing memos, cold and hot wallet ratio documentation, segregation accounting suitable for trust-bank reconciliation, and Travel Rule integrations on Notabene or Sumsub with the JVCEA member network. Incident response runs to a playbook modelled on the public Coincheck and DMM Bitcoin postmortems, which is what FSA examiners look for during onsite inspection.

Soneium is Sony Block Solutions Labs's OP Stack L2 launched in 2025, optimised for Sony's entertainment IP, consumer apps, and developer programs. Astar Network, founded by Sota Watanabe, is the leading Polkadot ecosystem chain originating in Tokyo, with Astar zkEVM offering Ethereum-compatible execution. We build on both. For consumer products that want Sony brand adjacency and OP Stack tooling familiarity, Soneium is the better choice. For projects that need Polkadot interoperability, Substrate-native execution, or Astar's existing DeFi and gaming partnerships, Astar is the better fit. Many Tokyo Web3 startups deploy on both, with Soneium for consumer flows and Astar for cross-chain or institutional integrations. We will recommend a primary based on your distribution strategy, not based on which ecosystem grant program is easiest to win.

Japanese consumers, especially in finance and gaming, prefer regulated, brand-backed, conservative products. Mercari's Mercoin succeeded because users trusted the Mercari brand and the disclosed JFSA license, not because the UX was crypto-native. bitFlyer's consumer flows look like a regulated brokerage, not Uniswap. Seed phrases, anonymous wallets, and DEX-style approval prompts trigger immediate abandonment. Our Japanese consumer Web3 builds use embedded wallets (Privy, Web3Auth, Magic) with social login, gas abstraction with paymasters, Japanese-language disclosures dense enough to satisfy consumer affairs review, polite confirmation modals at every value-bearing action, and clear escalation paths to human support. We test flows with Japanese-speaking users, not English speakers translating screens, and the conversion difference is consistently material.

Institutional custody in Japan splits between trust-bank custody for security tokens (Mitsubishi UFJ Trust, Sumitomo Mitsui Trust, Mizuho Trust as the only legally compliant ERTR custodians under FIEA), licensed exchange custody for crypto-assets, and qualified third-party custodians like Komainu (Nomura, Ledger, CoinShares) and BitGo Japan for hybrid use cases. We integrate with all three layers. For tokenized securities we wire into the trust bank rail through Progmat or START. For crypto-asset custody we deploy Fireblocks, BitGo, or Cobo with HSM-backed key shards and segregated wallet structures that match JVCEA cold storage ratio requirements. For DeFi and on-chain treasury management we ship MPC custody with policy engines on Fordefi or Coinbase WaaS, with Japanese-language operator interfaces and audit logs that pass JFSA examination.