How Bitcoin Treasury Companies Are Reshaping Japan’s Capital Markets

Japan’s Capital Markets Are Being Rewritten in Bitcoin

Japan has long been defined by financial conservatism. Decades of near-zero interest rates, a weakening yen, and a corporate culture that prizes cash hoarding over shareholder returns created a system that was stable, but stagnant. Few would have predicted that it would be a former budget hotel operator that lit the fuse on one of the most significant capital markets shifts the country has seen in a generation.

Since Metaplanet adopted Bitcoin as its primary treasury reserve in April 2024, Japan’s capital markets have changed in measurable ways. A new category of listed company has emerged: the Bitcoin treasury company. New financial instruments have been pioneered. Retail and institutional behavior has shifted. And regulators have been forced to respond — both encouraging innovation and erecting guardrails.

In this article, I’ll analyze exactly how Bitcoin treasury companies — led by Metaplanet — are reshaping Japan’s capital markets across five dimensions: corporate treasury behavior, capital markets innovation, retail investor access, regulatory evolution, and Japan’s macro positioning in the global Bitcoin economy.

The Macro Backdrop: Why Japan Was Ready for This

To understand why Bitcoin treasury companies took root so quickly in Japan, you need to understand the financial environment in which they emerged. Japan’s macro situation is, in many respects, a slow-motion emergency.

• Public debt-to-GDP: 235%. Japan’s national debt is proportionally the largest of any developed economy in the world, surpassing even the most indebted European nations.

• Real interest rates: Deeply negative. Even after the Bank of Japan’s historic rate hike in July 2024, real interest rates — adjusted for inflation — remained negative. Cash and Japanese Government Bonds (JGBs) were actively destroying purchasing power.

• Yen depreciation: Structural and persistent. The yen lost approximately 30–35% of its value against the dollar between 2020 and 2024, eroding the real returns of yen-denominated assets for anyone with global exposure.

• Corporate cash hoarding: Institutional problem. Japanese corporations held trillions of yen in near-zero-yielding cash reserves — a practice the Tokyo Stock Exchange itself was actively trying to reform through its ‘Price-to-Book’ improvement initiatives.

(Source: Institutional Crypto Adoption in Japan – Boosty Labs Q1 2025)

Into this environment, Metaplanet’s argument landed with force: Bitcoin is the logical alternative reserve asset for a company operating in an economy with structural yen weakness and negative real rates. It was not a speculative pitch. It was a coherent capital allocation argument grounded in Japan’s specific macroeconomic reality.

The Metaplanet Effect: A Catalyst, Not Just a Story

Metaplanet’s 2024 stock performance was one of the most dramatic in Japan’s market history. From approximately 34 JPY at the time of its Bitcoin pivot in April 2024, shares ultimately surged over 4,000% to reach 1,930 JPY at their peak in June 2025. In 2024 alone, the stock returned approximately 2,600% — the best-performing listed equity in Japan that year.

(Source: Benchmark Equity Research on Metaplanet (June 2025))

That kind of performance does not go unnoticed in corporate boardrooms. Japan’s stock market is full of undermanaged companies sitting on large pools of depreciating yen-denominated assets. Metaplanet’s performance made a simple but powerful argument: adopting Bitcoin as a treasury asset can unlock shareholder value on a scale that traditional restructuring cannot match.

The result was a wave of corporate imitation. Within 18 months of Metaplanet’s Bitcoin pivot, Japan had become the country with the most Bitcoin-holding publicly listed companies in Asia.

(Source: Brave New Coin – Quantum Solutions Launches $350M Bitcoin Treasury)

(Source: AInvest – Rise of Bitcoin as Corporate Treasury Asset in Japan)

What makes this list remarkable is the diversity of sectors represented. Hotels, energy companies, gaming firms, AI hardware distributors, nail salon chains. These are not tech startups or crypto natives. They are traditional Japanese listed companies responding to a genuine financial incentive.

Capital Markets Innovation: Instruments Japan Had Never Seen

Beyond inspiring imitation, Metaplanet has directly introduced new financial instruments and structures into Japan’s capital markets — instruments that did not exist in this form before, and that are now influencing how other companies think about raising capital.

Moving Strike Warrants: A Japanese First

In June 2025, Metaplanet executed what it described as Asia’s largest-ever equity raise dedicated to Bitcoin: a ¥770.9 billion (~$5.4 billion) capital raise through the issuance of 555 million shares via moving strike warrants. Critically, this was the first time in Japan’s capital markets history that moving strike warrants had been issued at a premium to the current market price.

(Source: CoinDesk – Metaplanet to Raise $5.3B in Japan’s Largest Stock Warrant Deal)

Moving strike warrants are equity instruments where the exercise price adjusts in line with the stock’s market price over time. Unlike fixed-strike warrants, they allow the company to raise capital incrementally and at favorable prices — only when the stock is strong. They also embed a critical investor protection: warrants are only exercised when shares trade above 1.01x mNAV, ensuring every new share issuance is accretive to BTC per share.

This structure was entirely novel in Japan. It has since been studied by investment banks and exchange officials as a potential template for Bitcoin-linked capital raises more broadly.

(Source: Presto Research – The Regulatory Arbitrage of Metaplanet)

Preferred Share Structures: MARS and MERCURY

Metaplanet also introduced Japan’s first Bitcoin-linked preferred equity instruments. MARS (Class A, adjustable rate) and MERCURY (Class B, fixed 4.9% annual dividend) are perpetual preferred shares that do not dilute common shareholders — a structure previously common in U.S. capital markets but largely absent from Japan.

These instruments allow Metaplanet to raise capital from institutional investors who want Bitcoin income exposure without taking direct cryptocurrency risk. MERCURY, in particular, raised approximately ¥21 billion (~$135 million) in its initial tranche — funded entirely by institutional demand.

(Source: CoinDesk – Metaplanet’s $150M Perpetual Preferred Offering)

Japan had never seen a domestic company issue perpetual preferred equity linked to Bitcoin performance. Metaplanet is now the blueprint that other Japanese companies and investment banks study when designing Bitcoin-adjacent financing structures.

Zero-Coupon Bonds and Bitcoin-Linked Debt

Metaplanet has also issued zero-coupon corporate bonds — short-dated instruments that pay no interest but are redeemed at face value — with proceeds directly allocated to Bitcoin purchases. This structure allows the company to front-load Bitcoin accumulation while deferring the capital cost to later warrant exercises.

The combination of moving strike warrants, zero-coupon bonds, and preferred equity creates a layered capital structure that manages dilution and leverage across different market conditions. It is, in my view, the most sophisticated Bitcoin treasury capital structure that has been deployed in Asia.

The Retail Revolution: NISA, Bitcoin, and a New Generation of Japanese Investors

One of the most underappreciated consequences of Metaplanet’s rise is what it has done to retail investor behavior in Japan. It has created a new pathway for Japanese households to gain Bitcoin exposure — without buying Bitcoin directly.

Japan’s Nippon Individual Savings Account (NISA) program was revamped in 2024 to allow a broader range of tax-free investment. Crucially, direct Bitcoin purchases attract capital gains taxes of up to 55% in Japan — among the highest in the developed world. But buying equity through a NISA account caps gains at 20% tax — or zero within the tax-free NISA wrapper.

Metaplanet’s stock became one of the most purchased NISA-eligible equities in Japan almost immediately after its Bitcoin pivot. Metaplanet’s shareholder count grew by over 1,075% from December 2023 to June 2025, with a particularly strong surge among millennials and Generation Z investors who understood Bitcoin but wanted a tax-efficient vehicle to access it.

(Source: Presto Research – Regulatory Arbitrage of Metaplanet – NISA Analysis)

(Source: CryptoNinjas – Metaplanet 4,000% Stock Surge)

This is a structural shift in Japan’s retail investment culture. A generation of Japanese investors — historically risk-averse and concentrated in savings accounts — is now gaining Bitcoin exposure through equities listed on the Tokyo Stock Exchange. The implications for Japan’s household asset allocation are significant and long-lasting.

The Tax and Regulatory Transformation

Bitcoin treasury companies have not just responded to Japan’s regulatory environment. They have helped accelerate its evolution.

The Road to a Flat 20% Crypto Tax

Japan’s current crypto capital gains tax of up to 55% has been a major structural barrier to institutional adoption. It is classified as “miscellaneous income” under Japanese tax law, subject to the top marginal rate rather than the flat 20% that applies to equities and most securities.

Japan’s Financial Services Agency (FSA) proposed reclassifying crypto assets under the Financial Instruments and Exchange Act (FIEA) as part of a 2026 regulatory overhaul. Alongside this, legislators have proposed a flat 20% capital gains tax for crypto — directly aligning it with equity taxation. If passed, this reform would dramatically increase the attractiveness of direct Bitcoin ownership for Japanese institutions and high-net-worth individuals.

(Source: AInvest – Japan 2026 Crypto Regulatory Overhaul)

The corporate Bitcoin treasury movement — led by Metaplanet — has been one of the key forces accelerating this policy discussion. It has demonstrated that Japanese listed companies can manage Bitcoin treasuries at scale, with governance and disclosure standards that satisfy exchange requirements. That track record strengthens the case for broader regulatory reform.

The JPX Governance Response

Not all regulatory movement has been in Bitcoin’s favor. In November 2025, the Japan Exchange Group (JPX), operator of the Tokyo Stock Exchange, began exploring stricter governance requirements for companies pivoting their core business to digital asset accumulation.

(Source: The Block – JPX Weighs Tighter Oversight of Listed Crypto Treasury Firms)

JPX’s concerns were legitimate. Companies like Convano — a nail salon operator — had pivoted to Bitcoin accumulation without the governance infrastructure or capital markets sophistication to manage the associated risks. Convano’s stock fell over 60% from its August 2025 peak. Three other Japanese companies were reportedly asked by JPX to pause their digital asset purchase plans.

Metaplanet CEO Simon Gerovich responded directly, noting that Metaplanet had held five shareholder meetings over two years to approve each major strategic step, amended its Articles of Incorporation to include Bitcoin as a core business activity, and maintained full disclosure and governance compliance throughout. "Corporate governance is the basis for all our decisions," Gerovich stated.

(Source: CryptoTimes – Japan Eyes Tighter Rules for Bitcoin-Holding Firms)

In my view, this regulatory tension is healthy and inevitable. A maturing market distinguishes between serious, well-governed Bitcoin treasury companies and opportunistic shells that pivot to crypto for a stock price pop. JPX’s scrutiny ultimately benefits Metaplanet by raising the bar for competitors and validating the governance standards that Metaplanet has established.

Institutional Capital: Japan’s Big Players Begin to Move

Perhaps the most significant long-term development is the shift happening at the institutional level. Japan’s largest asset managers, pension funds, and banks have historically avoided direct cryptocurrency exposure. That is changing.

A 2026 Institutional Investor Survey conducted by Nomura and its digital asset subsidiary Laser Digital, covering 518 Japanese investment professionals, found that Japanese institutional sentiment toward crypto closely mirrors where U.S. and European institutions were in 2024 — building positive sentiment, with diversification as the primary rationale and concerns shifting from existential to operational.

(Source: Blockhead – Japanese Institutional Investors Warming to Crypto (April 2026))

Major Japanese asset managers — including Daiwa Asset Management and Mitsubishi UFJ Asset Management — have begun preparing to launch Bitcoin and crypto-linked investment products. SBI Holdings and Nomura have been advancing Bitcoin ETF infrastructure. MUFG, SMBC, and Mizuho have developed blockchain initiatives for stablecoin-based cross-border payments.

(Source: AInvest – Institutional Bitcoin Yield in Japan)

This institutional awakening would not be happening at this pace without Metaplanet’s track record as a proof of concept. Japan’s institutional investors needed to see a Japanese listed company successfully manage a large Bitcoin treasury, raise capital against it, generate income from it, and maintain governance standards. Metaplanet provided that proof of concept.

The Five Ways Bitcoin Treasury Companies Have Changed Japan’s Capital Markets

Let me summarize the impact concisely across five dimensions.

Final Thoughts

Japan was, in many ways, the perfect environment for the Bitcoin treasury company model to take root and flourish. Structural yen weakness, negative real interest rates, a massive corporate cash problem, and a progressive regulatory framework created the conditions. Metaplanet — and the wave of companies it inspired — provided the spark.

What we are witnessing in Japan’s capital markets is not a fad. It is a structural reallocation driven by genuine macroeconomic logic. When the reserve currency of your corporate treasury is actively losing purchasing power, the search for a harder asset is rational, not speculative.

The innovations Metaplanet has introduced — moving strike warrants, Bitcoin-linked preferred equity, the NISA-eligible Bitcoin equity pathway, the options-based Bitcoin income generation model — are now part of Japan’s capital markets vocabulary. They will influence how future Bitcoin treasury companies are structured, financed, and governed, not just in Japan, but across Asia and beyond.

Japan is not following the global Bitcoin treasury trend. In many respects, it is leading it — building the financial infrastructure, regulatory framework, and market precedents that the rest of the world will eventually adopt.

Thank you for reading this insight and I hope you found it helpful. Check the latest prices of Metaplanet quoted on different exchanges at the link below:

Metaplanet-Trading-Hours

Sources & References

• Presto Research – The Regulatory Arbitrage of Metaplanet: What Japan Enables That the US Can’t

• Benchmark Equity Research on Metaplanet (June 2025)

• CoinDesk – Metaplanet to Raise $5.3B in Japan’s Largest Stock Warrant Deal

• CoinDesk – Metaplanet’s $150M Perpetual Preferred Offering (MERCURY)

• The Block – JPX Weighs Tighter Oversight of Listed Crypto Treasury Firms

• CryptoTimes – Japan Eyes Tighter Rules for Bitcoin-Holding Firms

• Blockhead – Japanese Institutional Investors Are Warming to Crypto (April 2026)

• AInvest – Rise of Bitcoin as Corporate Treasury Asset: Japan’s Institutional Revolution

• AInvest – Japan 2026 Crypto Regulatory Overhaul and Its Impact on Institutional Adoption

• AInvest – Institutional Bitcoin Yield in Japan: A Strategic Shift for Corporate Treasuries

• Boosty Labs – Institutional Crypto Adoption in Japan, Q1 2025

• Brave New Coin – Quantum Solutions Launches $350M Bitcoin Treasury Strategy

• CryptoNinjas – Metaplanet’s 4,000% Stock Surge: Japan’s Bitcoin Strategy Pays Off

• BeInCrypto – Japan Cracks Down on Crypto Treasury Stocks

• Bitcoin Treasuries – Japan Public Companies BTC Holdings

Disclaimer:

This article reflects my personal research and opinions and is for informational purposes only. It is not financial advice. I may be wrong, and markets are inherently risky. Always do your own due diligence and consult a licensed financial advisor before making any investment decisions.