Solving Stablecoins' "Fully Visible" Problem: Datachain's Compliance-Compatible Privacy Infrastructure

What Happened: KuraPrivacy Moves to Enterprise Validation with 10 Companies

Datachain launched an initial launch-partner program for its enterprise on-chain privacy infrastructure "KuraPrivacy." The participants are Angou-ya, Gaia, GALLUSYS, Green Monster, Gentosha, Speee, Tradom, Japan Blockchain Foundation, Fracton Ventures, and HODL1 (in Japanese alphabetical order). The platform has been in development since 2025, with test-environment verification already complete; the focus now shifts to building out wallets and transfer apps for daily business use and to UI/UX design. The product name derives from "kura" (the Japanese storehouse), expressing the idea of protecting value while limiting who may move it in and out. Datachain is a subsidiary of TSE Standard-listed Speee, co-founded Progmat, and also builds a Swift-API-linked cross-border remittance platform.

The Problem: "Transparency" Is the Biggest Barrier to Corporate Use

Stablecoins are anticipated as next-generation infrastructure for B2B and cross-border payments, yet blockchain's high transparency becomes a handicap. A structure where counterparties, amounts, and holdings are externally visible can expose a company's trade flows, prices, and salary levels to competitors. Whereas many new technologies stall on "lack of features," here the obstacle is "being too visible." Partner Angou-ya likewise notes that on-chain transparency can amount to practical information leakage. Gentosha expresses hope for "a solution that is easy to explain to counterparties and internal stakeholders," signaling that explainability is the key to corporate adoption.

Design Philosophy: Not Anonymization but "Selective Disclosure"

What matters is that this kind of infrastructure aims at "confidentiality," not "anonymity." In TRM Labs' framing, confidentiality hides amounts while leaving the transaction graph visible, whereas anonymity hides the graph itself. Corporate payments need the former: hiding amounts and counterparties from outside observers in normal times, while selectively disclosing to auditors and regulators via keys (viewing keys). If one can prove facts like "no transaction exceeded USD 10,000 in the past 30 days" without exposing raw data, regulators can actually supervise more efficiently. KuraPrivacy's stated reconciliation of AML/CFT, audit support, and multi-party key management rests precisely on this selective-disclosure design.

The Global Current: A Race in Confidential Settlement Has Begun

This is not a Japan-only move but part of a global race. Solana implemented "Confidential Balances" in Token-2022, and Paxos enabled confidential transfers for USDP (meeting NYDFS requirements). In the Ethereum world, OpenZeppelin provided a reference implementation of the confidential-token standard ERC-7984, targeting payroll, institutional settlement, and regulated finance. Using Zama's FHE, the first confidential OTC trade between KYC'd counterparties settled in March 2026. Among enterprise-focused players, Hinkal combines viewing keys with on-chain analytics (KYT), has processed over USD 400 million in confidential transactions, and makes "recipients can use their existing wallet with zero additional setup" its core differentiator. Payroll and trade finance—where prices, counterparties, and compensation cannot be exposed—are seen as promising 2026 use cases.

The Lineup Aiming for a Japan/Asia-Origin Standard

KuraPrivacy's path to winning can be organized into three points. First, minimizing adoption friction by offering both a confidential-transfer app usable with existing wallets and an enterprise wallet equipped with key management, recovery, Passkey authentication, workflow approval, and audit support. Second, progressively releasing APIs/SDKs so payment and wallet providers can embed the features into their own services, capturing surface area as infrastructure. Third, connecting to Datachain's existing corporate and financial-institution network—Progmat, tokenized deposits, and Swift integration. As AI-agent payments and RWAs expand, the necessity of "confidentiality" grows, and the venture aims to establish a Japan/Asia-origin standard for enterprise on-chain privacy.

[Business Development Insights]

1. Detect when the barrier to adoption is "excess," not "lack of features." Many new technologies stall from missing functionality, but blockchain is instead held back from corporate use by transparency that makes "everything too visible." New businesses must accurately diagnose whether what blocks adoption is "insufficiency" or "excess." If excess is the cause, value lies not in adding features but in the ability to control, shield, and selectively disclose. Misjudging the direction of the problem means investment in more features actually pushes adoption further away.
2. Treat regulatory compliance as a "product requirement" in the initial design, not a bolted-on "constraint." Consumer-grade privacy technology failed in the enterprise because it did not meet corporate requirements—AML/CFT, audit, multi-party key management. In new businesses, handling compliance as a constraint draped over a finished product forces rework. Building regulatory requirements into the initial architecture as essential opens the door to the large, high-barrier market of regulated industries. Compliance capability itself can become a hard-to-imitate competitive advantage.
3. Where network effects matter, a design that "demands nothing of the other side" determines adoption speed. In confidential settlement, adoption stalls if recipients are forced into a new wallet or migration. Being usable with an existing wallet at zero additional setup sways adoption more than feature superiority. In new businesses, the more a product requires both parties to participate, the more decisive it is to bring one side's adoption friction close to zero. Minimizing "the other party's effort," rather than one's own convenience, is the key to crossing the tipping point of diffusion.

[Sources]

• NADA NEWS, "Datachain to Validate Privacy Protection for Stablecoin Transactions—10 Companies Including HODL1 Join" https://www.nadanews.com/355604/
• Speee Inc. press release (PR TIMES), "Launch of the Initial Launch-Partner Program for On-Chain Privacy Infrastructure 'KuraPrivacy'" https://prtimes.jp/main/html/rd/p/000000328.000014788.html
• Atarashii Keizai, "Datachain Launches Initial Launch Program for On-Chain Privacy Infrastructure 'KuraPrivacy'; 10 Companies Join" https://www.neweconomy.jp/posts/583167
• Datachain official site https://www.datachain.jp/ja
• TRM Labs, "On-chain Privacy and Financial Compliance" https://www.trmlabs.com/reports-and-whitepapers/on-chain-privacy-and-financial-compliance
• CryptoSlate, "Solana launches zero knowledge-based Confidential Balances to merge privacy with compliance" https://cryptoslate.com/solana-launches-zero-knowledge-based-confidential-balances-to-merge-privacy-with-compliance/
• GTM 8020, "Best Enterprise On-Chain Privacy Solutions in 2026" https://www.gtm8020.com/blog/best-enterprise-chain-privacy-solutions
• insights4vc, "Privacy Trends for 2026" https://insights4vc.substack.com/p/privacy-trends-for-2026