How many investments has PARTNERS FUND made?

PARTNERS FUND has 23 tracked investments.

What stage does PARTNERS FUND invest at?

PARTNERS FUND invests at the Pre-Seed, Seed, Series A, Growth stages.

What is PARTNERS FUND's typical check size?

PARTNERS FUND typically writes checks of $200K – $2M.

Where is PARTNERS FUND located?

PARTNERS FUND is headquartered in Tokyo, JP.

Does PARTNERS FUND lead rounds?

Yes, PARTNERS FUND leads investment rounds.

Who does PARTNERS FUND co-invest with?

PARTNERS FUND most often shares deals with Full Commit Partners, Global Brain, Zeroichi Capital, among 11 tracked co-investors.

PARTNERS FUND

Venture capital

Tokyo · Pre-Seed–Growth · 10 people tracked

Also known as PARTNERS FUND株式会社

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Investment thesis

Partners Fund is an independent Japanese seed VC built around a 'Full Commit' philosophy of deeply supporting founders. Its capitalists act as co-founders, helping entrepreneurs from the idea and company-creation stage through seed and post-seed (up to pre-Series A). The firm is sector-agnostic, investing across B2C, B2B, DeepTech and CleanTech, and supports university-originated DeepTech startups via regional commercialization platforms. It typically takes a lead-investor role, aims to provide continuous follow-on support, and helps portfolio companies pursue diverse growth paths including global expansion, overseas fundraising, IPO and M&A, while seeking to build an evergreen, enduring VC organization.

Invests inBiotech Cleantech Consumer Deep Tech Enterprise Software HealthtechSector AgnosticSpace Tech Asia-Pacific Global Japan Tokyo

Source: firm website, verified Oct 1, 2026.

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Stage

Pre-Seed–Growth

Check

$200K – $2M

Tokyo, JP

Leads rounds

Leads

Instruments

Equity

Founded

2018

AUM

$433M

Tracked investments

Team · 10 people

from the firm's website

Masato Nakamura· 代表パートナー (Representative Partner)in

Focuses on healthcare and go-global portfolio support. Began at Takeda Pharmaceutical supporting researcher spinouts, worked at SoftBank Group on fundraising, earned an MBA from Cambridge Judge Business School, and helped launch Plug and Play Japan's Osaka office before joining the firm in 2022.

Ryo Taneichi· 代表パートナー (Representative Partner)in

Focuses on regional ties and university technology seeds. Started at Rakuten, helped launch its CVC Rakuten Capital, joined Incubate Fund, then founded Zero-Ichi Capital as a solo GP before merging into PARTNERS FUND in 2024.

Satoshi Fujii· 代表パートナー (Representative Partner)in

Leads fund and portfolio management. Began at Mizuho Trust & Banking, moved to Mizuho Capital as an investment manager across seed-to-later stages, and joined PARTNERS FUND in 2024.

Yudai Yamada· 代表パートナー (Representative Partner)· Tokyoin

Founder of PARTNERS FUND (originally Full Commit Partners, est. 2018). Previously worked at GREE in corporate branding, finance and IR, then joined Incubate Fund as an associate before founding his own firm, where he invested in 13 companies with a hands-on style.

Aiko Kuroda· インキュベーションパートナー (Incubation Partner)in

Started as a software engineer at Sony, then joined university startup Pixie Dust Technologies as its first employee through to exit. Focuses on deep tech startup creation and university seed support; joined the firm in 2025.

Hiroyuki Tsunokuni· インキュベーションパートナー (Incubation Partner)in

Background in life science research and corporate R&D, later industry-academia collaboration, and company creation / management talent sourcing at Tohoku University Venture Partners. Focuses on EIR sourcing and university seeds for deep tech; joined PARTNERS FUND in 2026.

Misato Hirata· シニアアソシエイト (Senior Associate)in

Worked in startups from her student years, joining Diary Inc. as its second employee in sales and marketing, then Live Consulting's startup-focused team supporting B2B sales. Joined PARTNERS FUND in 2026.

Takahiko Ido· シニアアソシエイト (Senior Associate)in

Spent his career in R&D at Ibiden developing ceramic and battery-related materials and driving commercialization. Focuses on social implementation of seed-stage technologies; joined the firm in 2026.

Yohei Noguchi· ファンドオペレーション (Fund Operations)· Wako, Saitama, Japanin

Accounting, tax and finance specialist handling fund administration and LP relations. Previously held roles at Jasdaq Securities Exchange, Aozora Investment, ABN Advisors and Ant Capital Partners; joined the firm in 2026. USCPA (Washington) and CMA certified.

Yuji Mizutani· シニアアソシエイト (Senior Associate)in

Began at Kansai Telecasting in broadcast technology, then moved to its new business division working on business development, M&A and investment. Joined PARTNERS FUND in 2026.

What they invest in

from 8 of 23 portfolio companies

AI & Machine Learning ×3Construction Tech ×2Digital Health ×2SaaS ×2Consumer ×1Creator Economy ×1Deep Tech ×1Direct to Consumer ×1

HQs:Japan×7

Investments · 23 tracked

founders shown can be your intro path

Deltan株式会社deltan.co.jp

Deltan is a healthcare technology company that develops digital solutions and services for the dental industry, partnering with dental professionals to modernize dental care delivery.

Digital HealthHealthtechSaaS

Co-investorsCygames Capital Full Commit Partners Global Brain Lifetime Ventures

GREEN SPOONgreen-spoon.jp

GREEN SPOON is a Japanese subscription meal-delivery service that ships individually portioned, flash-frozen ingredients and seasonings for customers to cook at home in about five minutes.

Direct to ConsumerFoodTechWellness & Fitness

Co-investorsBREW Full Commit Partners

KaKa Creationkakacreation.co.jp

Kaka Creation develops AI-powered tools for anime production, enabling individual creators to produce anime with improved speed and efficiency.

AI & Machine LearningCreator EconomyMedia & EntertainmentTokyo, JP

竹原康友(代表取締役CEO)Takehara(Representative)飯塚直道(CCO/プロデューサー)

Co-investorsAPOLLO CAPITAL Dentsu Ventures Full Commit Partners AMUSE FFG Venture Business Partners MIXI +2 more

Opt Fitoptfit.jp

OPTiM/OPTFIT is a Japanese company that develops AI-based products including "KaigoDX", a system offering bed-exit and fall detection for elderly care settings, and products for the fitness/sports sector.

AI & Machine LearningDigital HealthSports Tech

Co-investorsAccord Ventures FIRSTLIGHT Capital Full Commit Partners Zeroichi Capital

Pale Bluepale-blue.co.jp in 𝕏

Pale Blue develops and manufactures water-based propulsion systems for small satellites, serving satellite integrators and operators globally.

Deep TechHardwareSpace TechKashiwa, JP

Jun Asakawa(Founder)inKazuya Yaginuma(Founder)in Hiro Koizumi(Founder)inHiroyuki Koizumi(Founder)

Co-investorsaSTART Full Commit Partners Global Brain Shizuoka Capital Zeroichi Capital Itochu Technology Ventures

アルダグラムaldagram.com

Aldagram develops KANNA, an AI platform for on-site, non-desk work industries such as construction, real estate, and manufacturing.

AI & Machine LearningConstruction TechSaaS

インフラテック・ジャパン・ホールディングスinfratech-jp.com

Infratech Japan Holdings is a Japanese company focused on infrastructure maintenance, offering M&A and business succession, along with management and operational support services.

Construction TechImpact & Social Good

株式会社SAZOsazo.shop 𝕏

SAZO is a shopping forwarding service that allows Japanese customers to purchase Korean e-commerce products by submitting URLs, handling payment, international shipping, and customs clearance.

ConsumerE-commerceMarketplacesTokyo, JP

Co-investorsFull Commit Partners Japan Post Capital Co. Ltd.Zeroichi Capital

Other

Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.

AI共創総研biontoJizokuKinishKinTsugiSaitekiアグリべディアアグリぺディアウーオジョサンシーズスーパーワームノウンズムービーズモデラートリスマ

Portfolio news

latest coverage across their companies

Pale Blue completes Series C fundraising - Pale Blue|Water Ion Thruster, Hall Thruster, Space Mobility

Pale Blue · pale-blue.co.jp · Aug 7, 2025

Frequently asked questions

How many investments has PARTNERS FUND made?: PARTNERS FUND has 23 tracked investments.
What stage does PARTNERS FUND invest at?: PARTNERS FUND invests at the Pre-Seed, Seed, Series A, Growth stages.
What is PARTNERS FUND's typical check size?: PARTNERS FUND typically writes checks of $200K – $2M.
What sectors does PARTNERS FUND focus on?: PARTNERS FUND focuses on Biotech, Cleantech, Consumer, Deep Tech, Enterprise Software, Healthtech, Sector Agnostic, Space Tech.
Where is PARTNERS FUND located?: PARTNERS FUND is headquartered in Tokyo, JP.
Does PARTNERS FUND lead rounds?: Yes, PARTNERS FUND leads investment rounds.
Who does PARTNERS FUND co-invest with?: PARTNERS FUND most often shares deals with Full Commit Partners, Global Brain, Zeroichi Capital, among 11 tracked co-investors.

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