Kakao Pay and Kakao Bank signed a memorandum of understanding with Fireblocks on September 22, 2026, to jointly develop digital asset custody, tokenization, and settlement infrastructure tailored to South Korea's regulatory environment. The deal is the second major infrastructure partnership for ...
"Reliable infrastructure engineered to meet institutional requirements from day one is a prerequisite for widespread adoption." — Michael Shaulov, CEO and Co-Founder, Fireblocks
Kakao Pay and Kakao Bank signed a memorandum of understanding with Fireblocks on September 22, 2026, to jointly develop digital asset custody, tokenization, and settlement infrastructure tailored to South Korea's regulatory environment. The deal is the second major infrastructure partnership for Kakao Group in three months, following its July agreement with Circle to explore won-denominated stablecoin distribution across its 43-million-user payments platform.
The MoU is non-binding. No investment figure, go-live date, or commercial structure was disclosed. What it signals, however, is that South Korea's largest consumer fintech conglomerate is now assembling the full stack — issuance partner (Circle), custody and settlement layer (Fireblocks) — required to operate a compliant stablecoin business once the country's Digital Asset Basic Act clears the National Assembly, a milestone the ruling Democratic Party has targeted for late 2026.
The timing matters because the Kakao-Fireblocks deal lands in the middle of a six-way race to issue the first regulated Korean won-pegged stablecoin, a market where 18 million Koreans already hold cryptocurrency and where $40 billion in capital leaked to foreign dollar-backed stablecoins in Q1 2025 alone.
The three-party MoU covers three areas: custody architecture, tokenization frameworks, and settlement technology. The parties will run proof-of-concept tests to validate whether proposed distribution frameworks can operate under Korean regulatory and security requirements.
Kakao Pay CEO Shin Won-keun, who co-heads the group's Stablecoin Task Force, called the agreement "an important foundation" for reliable digital asset distribution in Korea. Kakao Bank CEO Yun Ho-young said the partnership aims to "develop secure and accessible digital asset services that expand our customers' financial opportunities."
The deal does not cover issuance. That function sits with the separate Circle partnership signed in July 2026. Together, the two agreements position Kakao Group with the core components of a stablecoin operation: Circle supplies the issuance and global payments technology; Fireblocks supplies the institutional-grade custody, wallet infrastructure, and transaction processing layer.
Kakao Group's stablecoin strategy has moved in discrete steps:
| Date | Event | |------|-------| | January 2026 | CEO Jung Shin-ah announces won stablecoin strategy in New Year address | | July 2026 | MoU signed with Circle to explore USDC-powered KRW payments and won-denominated digital assets | | September 22, 2026 | MoU signed with Fireblocks for custody, tokenization, and settlement infrastructure |
The group's internal Stablecoin Task Force operates across three entities: KakaoTalk (messaging, 90% penetration in South Korea), Kakao Pay (43 million registered users, KRW 43.1 trillion / $30.2 billion in payment volume in 2024), and KakaoBank (the country's largest digital-only bank).
Kakao also controls the Kaia blockchain, formed from the 2024 merger of Klaytn and LINE's Finschia networks. The group has filed trademark applications for PKRW, KKRW, and KRWP — three potential won stablecoin brand names.
A June 2026 report from Seoul Economic Daily indicated that Kakao determined KakaoBank alone was insufficient to anchor a stablecoin operation. The digital-only bank lacks the corporate and institutional customer base, foreign exchange infrastructure, and large-scale reserve asset management capabilities required under proposed legislation. This pushed the group toward recruiting commercial bank partners — including reported discussions with BNK Financial and JB Financial — to form a broader issuing consortium.
The Korean won stablecoin market has crystallized into at least six competing camps, according to reporting by Seoulz and Seoul Economic Daily:
1. Kakao Group — 43 million Kakao Pay users, KakaoBank, Kaia blockchain, Circle and Fireblocks partnerships. Tiger Research analyst Kim Jung-ho has described Kakao as "the largest camp," noting it "has formed a joint affiliate TF and is pushing to build a super wallet."
2. Naver Financial + Dunamu (Upbit) — Naver Financial completed a share swap with Dunamu, operator of Upbit (Korea's largest exchange and the world's fourth-largest by volume). The merged entity has an estimated combined market cap of 50 trillion won (~$35 billion). The two are building GIWA, a custom Ethereum Layer-2. A pilot using Busan's "Dongbaek-jeon" regional currency serves 1.5 million monthly users. Hana Bank acquired a 6.55% stake in Dunamu for approximately 1 trillion won ($748.7 million) in May 2026, joining this alliance.
3. Bank Consortium — KB Kookmin, Shinhan Financial, Woori Bank, NongHyup, Industrial Bank of Korea, and others held closed-door discussions in Seoul in June 2026 on a joint won stablecoin initiative. KB Financial and Toss are reported as a possible pairing within this group.
4. Toss (Viva Republica) — 30 million platform users. Holds integrated licenses for banking, securities, and payments. Planned deployment of 500,000 offline payment terminals by late 2026, rising to 700,000 by 2027, giving it a retail point-of-sale advantage that no competitor currently matches.
5. BDACS + Woori Bank — BDACS (Busan Digital Asset Custody Service) launched KRW1, the first Korean won stablecoin, on the Avalanche blockchain in September 2025. It operates with Woori Bank, one of Korea's four largest commercial lenders, and partnered with Plume, a global RWA network, in February 2026.
6. Coupang Pay — NYSE-listed Coupang ($33 billion annual revenue) posted stablecoin-related job listings in March 2026. Analysts estimate the company could realize $200 million in annual savings through stablecoin adoption across its warehouse-to-checkout supply chain.
All six camps are operating in anticipation of the Digital Asset Basic Act, a comprehensive law the ruling Democratic Party proposed in April 2026. The bill introduces bank-style oversight for stablecoin issuers and formally ends a long-standing ban on corporate cryptocurrency investment.
Key proposed requirements:
The bill's passage has been delayed by a dispute between the Bank of Korea, which insists banks holding at least 51% of issuing entities should be the only authorized issuers, and the Financial Services Commission, which warned such a restriction could hinder fintech competition. President Lee Jae-myung has framed a Korean won stablecoin as a matter of monetary sovereignty, citing the $40 billion capital outflow to foreign dollar-denominated stablecoins.
The Financial Services Commission targeted introduction in early September 2026. As of publication, the bill has been submitted but not passed.
Fireblocks brings to the partnership: an $8 billion valuation following a $550 million Series E; over 2,500 institutional clients, including more than 100 banks; more than $16 trillion in cumulative digital asset transactions across 200+ blockchains and 300 million wallets; and a qualified custodian charter through a trust company licensed by the New York State Department of Financial Services since mid-2025.
The company's client roster includes BNY Mellon, Revolut, Worldpay, BNP Paribas, and Galaxy Digital. Its MPC-based (multi-party computation) wallet architecture and policy engine are positioned as the institutional standard for digital asset operations.
For Fireblocks, the Kakao deal opens a path into a market where 11.13 million crypto investors (21% of the population) trade through an exchange duopoly — Upbit and Bithumb control approximately 96% of volume — and where Korean won-denominated trading accounts for 30% of global spot crypto volume.
South Korea's payments market reached $1.34 trillion in 2026 and is projected to grow to $1.84 trillion by 2031, according to Mordor Intelligence. The mobile payments segment alone hit $48.3 billion in 2026.
The stablecoin opportunity sits at the intersection of three flows:
1. Cross-border leakage. $40 billion flowed from Korean exchanges into foreign dollar-backed stablecoins in Q1 2025 alone. Bitcoin trades at a persistent "Kimchi Premium" of approximately 10% above New York prices. USDT trades at a 5% premium in Korea. A won-pegged stablecoin with deep local liquidity could reduce or eliminate this premium, keeping settlement capital onshore.
2. Domestic retail payments. Kakao Pay processed KRW 43.1 trillion ($30.2 billion) in 2024 with 24 million monthly active users. Embedding stablecoin settlement into this existing flow would not require new user acquisition — it would add a settlement layer beneath transactions that already occur.
3. Institutional adoption. Exchange operating profits fell 38% in 2026. Retail trading frequency dropped 22% year-over-year, with ages 18-29 trading down 30%. Institutional capital — via crypto funds, family offices, and corporate treasuries — is the growth vector. Fireblocks' custody infrastructure is built for this segment.
The value extraction question is direct: whoever controls the issuance-custody-settlement stack for the won stablecoin will sit in the middle of these three flows. The MoU between Kakao and Fireblocks is a positioning move in that direction.
The Kakao-Fireblocks MoU is a proof-of-concept agreement, not a product launch. Its significance lies in what it completes: a full-stack stablecoin architecture — issuance (Circle), custody and settlement (Fireblocks), distribution (Kakao Pay and KakaoBank) — assembled in advance of legislation that has not yet passed.
Whether this stack activates depends on two variables: the final form of the Digital Asset Basic Act (particularly the bank ownership threshold for issuing entities) and whether Kakao can assemble a commercial bank consortium willing to anchor the reserves. Both remain unresolved.
What is resolved is the competitive landscape. Six camps with combined user bases exceeding 100 million accounts are building in parallel. The first to secure regulatory authorization, institutional custody, and consumer distribution will control the settlement layer beneath South Korea's $1.34 trillion payments market. Kakao's September deal with Fireblocks is one more piece on a board where the game has not yet started.