At a Glance
- Legal name
- TBM Co., Ltd.
- Jurisdiction
- Japan
- Ownership
- private
- Employees
- 500-1000
- Revenue (est.)
- $100M-$500M
- Headquarters
- Ginza 3-1-1, Ginza First Five Building 9F, Chuo-ku, Tokyo 104-0061
TBM is a Tokyo-headquartered materials technology company that develops and manufactures LIMEX, a calcium-carbonate-based composite that the company markets as a sustainable alternative to plastic and paper.
TBM is a Tokyo-headquartered materials technology company that develops and manufactures LIMEX, a calcium-carbonate-based composite that the company markets as a sustainable alternative to plastic and paper. The core idea is to substitute limestone, which is globally abundant, for the petroleum derivatives in conventional plastics and the wood pulp in conventional paper, reducing both crude-oil and water inputs.
Founded in 2011 by Nobuyoshi Yamasaki, TBM has grown into one of Japan's most-watched climate-tech companies. The company operates a flagship factory in Shiroishi, Miyagi Prefecture, with additional capacity expansion announced in subsequent years. Its product range covers LIMEX Sheet (a paper-like material), LIMEX Pellet (an injection-molding feedstock), and a growing line of food-packaging, business-card, and signage products.
TBM has raised multiple late-stage private financings led by Japanese institutional investors and government-affiliated funds, and has been frequently cited in Japanese policy circles as a poster child for the country's green transformation (GX) initiatives. The company has not yet listed publicly but has flagged a future JPX listing as part of its growth roadmap. Its position straddles materials science, manufacturing, and circular-economy policy, making it a structurally different bet from the consumer-software-heavy Tokyo tech cohort.
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Estonia e-Residency play
TBM is interesting precisely because it sits outside the consumer-SaaS pattern that dominates Tokyo tech, and its corporate structure reflects the older Japanese norms more than the freee-Mercari-Sansan template.
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Estonia e-Residency play
**KK with capital-intensive growth needs.** TBM is a Kabushiki Kaisha, which is the right form for any company planning to raise priced equity rounds, eventually list on the JPX, and operate physical manufacturing assets that suppliers and lenders want to underwrite against a familiar legal vehicle. A GK (Godo Kaisha) would be inappropriate here because GKs cannot list, and lenders financing factory equipment generally prefer KKs with a clear shareholder register and statutory governance.
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Share class engineering
**Founder voting share patterns.** Like most modern Tokyo KKs, TBM cannot deploy US-style dual-class shares because Japanese listing rules disfavour them. Founder Nobuyoshi Yamasaki preserves influence through pre-IPO ownership concentration, supportive long-term Japanese investors, and board composition. This is the core reason some Japanese founders accept slower capital raises in exchange for retained operational control.
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Estonia e-Residency play
**JPX Growth as the realistic listing destination.** When TBM does eventually list, the most likely tier is JPX Growth (the post-2022 successor to Mothers), which is designed for high-potential but not-yet-mature companies. Migration to Prime would follow once the company satisfies a 10-billion-yen tradable market cap, 800-shareholder, and 35 percent free-float threshold. The Mothers-to-Prime path is now the canonical Tokyo growth-tech route, with Mercari, freee, Money Forward, and Sansan having all walked it.
Replicate TBM's structure in 4 steps
The formation playbook, distilled from how this company was actually set up.
Estonia e-Residency play
Incorporate a KK at the Tokyo Legal Affairs Bureau. Notarise the articles of incorporation, deposit paid-in capital sized to your manufacturing ambitions (often 50-100 million yen for a credible factory-funding raise), and register the company seal.
Estonia e-Residency play
Adopt the company-with-audit-committee governance model from the outset to align with future JPX Prime expectations and modern investor norms.
Estonia e-Residency play
Register at least one Japanese-resident representative director. A foreign founder may serve in this role on a Business Manager visa, though manufacturing companies often appoint a Japanese co-founder or senior operator as well.
Apply for industry-specific licenses early
Apply for industry-specific licenses early. Materials and manufacturing are subject to fire safety, building code, and environmental approvals from the prefectural and municipal authorities.
Recent News & Filings
- TBM mayor Andrea Matrosovs will not seek reelection - CollingwoodToday.caCollingwoodToday.ca · 29 Apr 2026
- Groupe Capelle moves pair of TBM units for Toulouse metro works - Heavy Lift & Project Forwarding InternationalHeavy Lift & Project Forwarding International · 29 Apr 2026
- Airborne SnF26 Day 2 Redux: Viking Twin V-42!, TBM 980 Arrives, Integral R - Aero-News.netAero-News.net · 29 Apr 2026
- Hudson Tunnel Project nears TBM phase in North Bergen - NJBIZNJBIZ · 27 Apr 2026
- Randy’s Warbird Profiles: General Motors TBM-3E Avenger BuNo 53575 - Vintage Aviation NewsVintage Aviation News · 26 Apr 2026
Frequently Asked Questions
Why is TBM a KK rather than a GK?
TBM expects to list on the JPX eventually, and only KKs can list. KKs are also the form that Japanese banks, suppliers, and equipment-financing lenders are most comfortable underwriting against, which matters for a manufacturing-heavy company. A GK would be inappropriate for TBM's ambitions even though GK incorporation is cheaper and faster.
What does it take to list on JPX Growth, where TBM is most likely to debut?
Growth is the post-2022 successor to the old Mothers tier and is designed for high-potential earlier-stage companies. Headline thresholds include a tradable market cap of at least 500 million yen, at least 150 shareholders, a 25 percent free float, and the same audit-committee or three-committees governance options Prime requires. Companies graduate from Growth to Prime once larger thresholds are met.
Are there foreign-shareholder restrictions on Japanese materials companies?
For most materials and manufacturing categories there is no general foreign-ownership cap. The Foreign Exchange and Foreign Trade Act does require pre-notification for large stakes in sectors deemed national-security-relevant, which can include certain advanced materials, dual-use chemicals, and infrastructure-related processes. Sustainable plastic alternatives are generally outside the restricted-sector list, but each transaction should be reviewed.
How did the 1-yen-minimum-capital reform change incorporation in Japan?
The 2006 Companies Act abolished the prior 10-million-yen minimum for KKs and the 3-million-yen minimum for what is now the GK form. Today a KK can be incorporated with 1 yen of paid-in capital. In practice 1 million yen is the working floor, and capital-intensive companies like TBM raise materially more before commencing factory operations.
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