🪙 "January 2028 will be the inflection point." That's the bold claim from a senior executive at SMBC, one of Japan's largest megabanks. The reasoning: two of Japan's biggest financial reforms — a tax overhaul and a financial-instruments-law revision — are designed to take effect on the same day. Meanwhile, Mitsui & Co. is preparing to take its gold-, silver-, and platinum-backed "ZipangCoin" cross-border on public blockchains, and inside Japan's first regulated yen stablecoin JPYC, 95% of trades are already executed by AI. Japan's on-chain finance has quietly moved past the talking phase and into the runway-before-takeoff phase.

A Glimpse of Japan's "All-Hands" Approach

On April 23, 2026, digital asset infrastructure provider Fireblocks hosted an event in Tokyo featuring Kazuho Isowa, Senior Managing Executive Officer and Group CDIO of Sumitomo Mitsui Financial Group (SMFG), and Shinsuke Waka, Executive in Charge of Digital Finance at Mitsui & Co.'s Corporate Development Division. The session, moderated by Fireblocks' Tsuyoshi Makino, was reported by Japanese fintech outlet NADA NEWS, which covered the conversation in detail.

The big theme: on-chain finance and the tokenization of Real-World Assets (RWA).

According to NADA NEWS, Isowa described SMFG's approach as a deliberate two-front push — payment instruments and investment products at the same time. On the payments side, the bank is preparing for a future where stablecoins, tokenized deposits, and other instruments coexist rather than one winner taking all. On the investment side, money market funds (MMFs) and ETFs are explicitly on the table.

What sets the bank's approach apart is its internal structure. Rather than running this out of a digital-only team, SMFG has assembled a cross-departmental task force pulling in payments, markets, securities, cards, and trust. The piece reports Isowa described this as "doing both sides simultaneously" — covering liquidity, settlement operations, and regulatory compliance in one coordinated effort. This is unusual; most large banks worldwide have treated crypto-adjacent work as a digital-team side project.

Why January 2028 Matters

The single most quoted line from the event was Isowa's prediction: "I believe a major inflection point will arrive in January 2028."

To understand why, you need to look at how two policy reforms are scheduled to converge.

The first gear: tax reform. Japan's December 2025 tax outline (the "Reiwa 8 Tax Reform Outline") committed to applying a flat 20.315% separate withholding tax on cryptocurrency gains. Today, those gains are taxed as "miscellaneous income" — bundled with salary and other earnings under progressive rates that can hit 55%. On a profit of 10 million yen (about $64,000), the tax bill could reach roughly $35,000. After reform, that drops to a level comparable to stocks.

The second gear: financial-business law reform. The Cabinet approved on April 10, 2026 a bill to reclassify crypto assets — moving them out of the Payment Services Act (where they sit as "settlement means") and into the Financial Instruments and Exchange Act (FIEA), where they will be treated as financial products. With that come insider-trading rules, mandatory disclosure, and administrative penalties through the Securities and Exchange Surveillance Commission.

Here's the key design point: the new tax regime is written to take effect "from January 1 of the year following the FIEA amendment's effective date." If the FIEA changes come into force during 2027, the tax change activates on January 1, 2028 — at the same instant.

"When those two pieces line up," Isowa said, "things will start moving all at once."

What "moving" looks like: domestic crypto exchanges will need to re-register as licensed financial-instruments businesses. Crypto ETFs become viable for issuance and sale within Japan. Pension funds and insurers — many of which have internal rules forbidding holdings of "non-financial-instrument assets" — finally have a door they can walk through. The dominoes can fall fast.

ZipangCoin Goes Cross-Border

Mitsui & Co.'s Waka used the stage to outline the next chapter for "ZipangCoin (ZPG)," the company's series of crypto assets backed by gold, silver, and platinum. Launched in 2022 on a private blockchain for Japanese investors, ZipangCoin has, until now, been a domestic experiment.

The rationale for starting with precious metals was practical: among commodities, precious metals behave most like financial instruments. Trading volume in London is deep, market structure is well understood, and Mitsui & Co. has decades of experience in commodity derivatives and real estate asset management to draw on.

The next step, according to NADA NEWS, is cross-border. Public-chain support, hardened security, and stronger custody arrangements are now the focus — and the partnership with Fireblocks fits inside that strategy.

That trajectory aligns with where the global RWA market is heading. Excluding stablecoins, on-chain RWA assets ballooned from roughly $5 billion at the end of 2022 to about $36 billion by the end of 2025, a more than seven-fold expansion in three years. McKinsey projects the market could reach $2 trillion by 2030; BCG's bullish scenario goes as high as $16 trillion. Mitsui & Co.'s pivot from a private-chain pilot to a cross-border, public-chain product positions a Japanese trading house at the front of that wave.

"95% of JPYC Trades Are Done by AI"

The line that drew the loudest reaction in the room came when Isowa shared a single statistic: 95% of trades on Japan's first regulated yen stablecoin, JPYC, are executed by AI agents.

JPYC, issued by JPYC Inc., began official issuance as a registered fund-transfer-services provider in October 2025. Each unit is pegged 1:1 to the yen. Cumulative issuance has crossed ¥1 billion (over $6 million) and the holder count is in the tens of thousands.

The fact that nearly all of that activity is now machine-driven says something about the nature of on-chain finance itself. Programmable money plus AI agents equals transactions that complete without human judgment in the loop — settle automatically when conditions are met, trade based on signals, talk to other services through APIs, run 24/7. No human hands.

Isowa argued this trajectory is going to extend: in the near future, a large share of all financial transactions could be initiated by AI. Mitsui & Co. is already piloting AI-driven commodity trading, encoding the firm's institutional know-how into algorithms that surface trade ideas in gold, nickel, and other commodities. The current setup keeps a human in the loop — the AI doesn't yet pull the trigger on its own.

Should AI Have Legal Personhood? Japan's Cultural Argument

This led the panel into deeper territory. If an AI agent makes a wrong transfer, who's liable? More fundamentally, can an AI be recognized as an autonomous agent — something like a legal person — for the purpose of trading and contracting?

Western legal scholars have been wrestling with this for years. Isowa offered an unusual angle on Japan's position.

"Whether to grant legal personhood to AI agents is an extremely difficult problem," he said. "But I believe Japan is the country in the world best positioned, culturally, to grant it."

His argument was anthropological. Japan is shaped by polytheistic and animist traditions — the idea that spirit can reside in any object — and has a long history of seeing personhood in things, characters, and tools. Astro Boy, Doraemon, the "yaoyorozu no kami" (eight million gods) concept, tsukumogami (objects that gain a soul after a hundred years) — these aren't just curiosities, they're cultural priors that make humans-and-machines coexistence feel natural rather than threatening.

This dovetails with global "AI personhood" debates. The European Parliament floated giving robots "electronic person" status in a 2017 resolution, but the idea was dropped from later legislation. In the US, communities have used existing limited-liability-company structures as a vessel for autonomous-organization (DAO) governance, an indirect workaround. If Japan ever moved to formally recognize AI legal personhood within its laws, it could be the first jurisdiction to do so explicitly.

How Japan Compares to JPMorgan's Kinexys

The natural reference point for Japan's bank strategy is JPMorgan's Kinexys (formerly Onyx), the largest bank-run blockchain network globally. As of April 2026, Kinexys reported cumulative transactions exceeding $3 trillion since inception, with average daily volume above $5 billion. Clients span five continents — BMW, Siemens, South Africa's FirstRand Bank, and Mitsubishi Corporation among them. JPMorgan also began issuing JPM Coin on Coinbase's public chain "Base." JPMorgan's model is largely "go it alone": build proprietary infrastructure at scale, pull in major clients.

Japan's three megabanks — MUFG, SMBC, and Mizuho — chose cooperation instead. The plan, announced in late 2025, is a single trust-type stablecoin under one unified brand, jointly funded by the three banks (with MUFG Trust as sole trustee), built on the Progmat platform. Standardizing across competitors avoids fragmentation and lifts the underlying infrastructure for everyone.

Other regional approaches: HSBC's Orion uses Hong Kong and Singapore as Asia hubs and has helped issue more than $3.5 billion in digitally native bonds. France's SocGen-FORGE runs the EURCV euro stablecoin on public blockchains. Deutsche Bank is piloting tokenized deposits.

Strategies differ. The common thread is that no major financial institution is sitting still. What makes Japan's design distinctive is the deliberate alignment of tax reform, business-law reform, and joint industry infrastructure to all activate at roughly the same moment.

"It Feels Like the Eve of Cashless Adoption"

To close the panel, Isowa reached for an analogy familiar to any Japanese commuter. The arrival of the smartphone is what made cashless payments — Suica, PayPay, Rakuten Pay — go from niche to ubiquitous in Japan. He suggested on-chain finance is in a similar pre-takeoff position now, with AI plus programmable money playing the role the smartphone once played.

"Finance is going to look completely different from what we have today. Things we can't imagine right now will become normal."

Waka added a related point: digital finance is still early enough that no incumbent has run away with the prize. Cross-border collaborations are still forming, and many players — including newcomers — can join "from round one" rather than playing catch-up to entrenched leaders.

What's Still in the Way

For all the optimism, plenty of friction remains.

Legal gaps are real. Liability when an AI agent misroutes funds, the personhood question, how tokenized assets map to existing securities law, anti-money-laundering rules in practice — none of these are solved.

International scale comparisons are humbling. Kinexys settles roughly $5 billion a day. Japan's three-megabank stablecoin announced its pilot phase in late 2025, with SBI Holdings, Progmat, and others moving in parallel — but the order-of-magnitude gap in current volume is real.

And there's a sober economic reality. Japan's household financial assets exceed ¥2,200 trillion (about $14 trillion), but the share allocated to risk assets remains low by international standards. As one financial industry source put it bluntly: "Even if the box is built by January 2028, whether it gets filled is a separate question."

What's Your Country Doing?

Stablecoins, tokenized deposits, RWAs, AI agents — themes that used to be discussed separately are now being stitched together inside the operations of Japanese megabanks and trading houses. Japanese on-chain finance has shifted from "waiting for rules" to "preparing for implementation."

In January 2028, when those two reform gears engage at the same time, what actually happens? Will Japan be the first country to formally recognize AI legal personhood? Can a cooperative three-bank model actually compete with JPMorgan's go-it-alone Kinexys?

How far has your country's banking system gone with on-chain finance? Where do you stand on the "AI legal personhood" question? In a financial system where AI handles 95% of stablecoin trades, what role do you think humans will keep?

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