LINE NEXT Opens Unifi Pay for Zero-Fee Stablecoin Payments
July 3, 2025 — LINE NEXT, the U.S.-based blockchain affiliate of LINE Yahoo, has opened developer pre-registration for Unifi Pay, a zero-fee stablecoin payment infrastructure slated for global launch in the third quarter. The service will initially support USDT, JPYC, and IDRP through the Unifi stablecoin wallet.
Immediate Details & Direct Quotes
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Unifi Pay processes payments and settlements directly through a wallet-based structure, eliminating all transaction fees for users. According to a CoinPost report, the beta version handled 100 billion Korean won (approximately 10 billion Japanese yen) in cumulative payment and settlement volume over the past year.
The service offers an average settlement speed of about one second. Developers can integrate payments using the Unifi Pay SDK, which utilizes an Agent-to-Agent (A2A) task execution method for AI agents. LINE NEXT says the SDK allows a payment page to be created in approximately 10 minutes through a single command input.
“Unifi Pay directly connects users and suppliers and removes payment fees from the transaction process,” the company stated in its announcement.
LINE NEXT CEO Youngsu Ko said the company plans “to establish Unifi Pay as a payment infrastructure that connects developers, creators, and users around the world through its developer tools.”
Developers who keep payment proceeds in the wallet may receive annual rewards of up to 5%, depending on the stablecoin type. The reward model is tied to stablecoin holdings inside the wallet.
Market Context & Reaction
Unifi Pay will launch globally supporting three stablecoins: Tether’s USDT, the Japanese yen-denominated JPYC, and the Indonesian rupiah-denominated IDRP. In Japan and Indonesia, users can complete online identity verification and top up JPYC or IDRP directly from bank accounts. LINE NEXT confirmed plans to add local stablecoins in additional countries based on each market’s regulatory environment.
The service provides a function enabling settlement funds to be sent directly to bank accounts through connected crypto exchanges and blockchain remittance solutions. This gives suppliers and developers a path to convert stablecoin payments into bank account funds after receiving them through the wallet.
LINE NEXT has access to LINE Yahoo’s 300 million user base, providing a substantial built-in market for the payment infrastructure.
Background & Historical Context
Unifi Pay’s development follows Project Unify, announced during Korea Blockchain Week in September 2025. Project Unify was described as a stablecoin super-app designed to bring payments, yield, on/off-ramps, and access to over 100 decentralized apps into LINE Messenger, which Kaia reported had nearly 200 million monthly active users across Japan, Taiwan, Thailand, and Indonesia.
Project Unify was set to support USD, JPY, KRW, THB, IDR, PHP, MYR, and SGD at launch, offering developers and issuers a Unify SDK with regulatory compliance focus, particularly for South Korea. The initiative followed the 2024 merger of LINE’s Finschia and Kakao’s Klaytn into Kaia, which positions itself as Asia’s stablecoin orchestration layer.
LINE NEXT has now started accepting developer pre-registrations ahead of Unifi Pay’s official global rollout.
What This Means
In the short term, developers and businesses in Japan and Indonesia gain immediate access to zero-fee stablecoin payments with direct bank account integration. The one-second settlement speed could make Unifi Pay competitive with traditional payment rails for low-cost, high-speed transactions.
The 5% annual reward for holding stablecoins in the wallet creates an incentive for developers to maintain balances within the Unifi ecosystem rather than immediately cashing out.
Long-term, LINE NEXT’s expansion into additional local stablecoins across different markets could position Unifi Pay as a multi-currency payment infrastructure spanning Asia and beyond. The platform’s access to LINE Yahoo’s 300 million users provides significant adoption potential.
The planned global launch in the third quarter represents the next phase following a successful beta that demonstrated volume and real-world usage across 100 billion won in transactions.