/Investor DB

Seiho Investment Works

Venture capital

Kyoto · Seed–Series A · 7 people tracked

Also known as 栖峰投資ワークス株式会社

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Investment thesis

Seiho Investment Works believes a VC's role goes beyond supplying risk capital: it must assess investment eligibility, help portfolio companies build sound management, generate returns commensurate with risk, and demonstrate the social and economic value of innovation. Guided by a principle of 'fairness', the firm invests hands-on in seed to early-stage technology companies nationwide across Japan, spanning healthcare/bio, consumer-facing (BtoC) IT, enterprise (BtoB) IT, and deep tech. It provides operational support from founding through maturity, drawing on decades of experience and networks built at Osaka Small and Medium Business Investment & Consultation.

Source: firm website, verified Sep 20, 2026.

Stage
Seed–Series A
Check
$67K – $670K
HQ
Kyoto, JP
Instruments
Equity
Founded
2017
Tracked investments
31
Unicorns
1

Team · 7 people

from the firm's website
関 兵馬· 代表取締役 (Representative Director)

Born 1973; graduated from Doshisha University (Economics) and completed a master's in finance at the University of London. Spent 20 years at Osaka Small and Medium Business Investment & Consultation Co., handling venture and SME investments in the Kinki region. Became Representative Director on the firm's founding in August 2017.

根井 大樹· 財務担当取締役 (Director, Finance)

Graduate of Keio University (Environmental Information); a certified public accountant and tax accountant. Worked at Panasonic and a Kyoto audit firm (now PwC Japan) before founding his own tax accounting office. At the firm he leads fund management, accounting reporting, and tax matters.

菅 靖二· ポートフォリオマネージャー (Portfolio Manager)

Born 1963; graduated from Osaka Prefecture University (Economics). Long career at Osaka Small and Medium Business Investment & Consultation Co., including roles as investment division head and director, supporting roughly 500 SMEs and startups. Joined in the current role in 2025.

岡 友樹· シニア・アソシエイト (Senior Associate)𝕏

Born 1981; graduated from the University of Electro-Communications (quantum physics engineering). Worked at Toshiba Information Systems on system development and project management, then became an angel investor, company representative, IT consultant, and a sourcing lead at a Singapore accelerator VC. Joined in the current role in 2023.

田中 崇公· 監査役 (Auditor)

Graduate of the University of Tokyo (Law), with graduate degrees from Osaka Institute of Technology (IP) and the University of Washington (Law). Partner attorney at Nakanoshima Chuo Law Office; attends the firm's board/investment committee and advises the management team.

西口 雅章· 社外取締役 (Outside Director)

Graduate of Doshisha University (Law). Worked at Nanto Bank and Nomura Securities (investment banking) before becoming representative director of Optimus Advisors. Advises on M&A and capital alliances and participates in the firm's weekly investment meetings.

黒坂 流星· シニア・アソシエイト (Senior Associate)

Born 1998; graduated from Waseda University (Sociology). Began his career at Osaka Gas in sales promotion, then worked in finance and back-office roles at a sales-tech startup and in business-turnaround consulting before joining in the current role in 2023.

What they invest in

from 20 of 31 portfolio companies

SaaS ×7Future of Work ×5AI & Machine Learning ×4Enterprise Software ×4Healthtech ×3AgTech ×2Consumer ×2Creator Economy ×2

HQs:Japan×19United States×1

Investments · 31 tracked

founders shown can be your intro path
株式会社インゲージingage.co.jp𝕏✓ verified

INGAGE develops and provides Re:lation, a cloud-based communication platform designed for customer-facing teams to manage individual customer interactions.

Cloud ComputingEnterprise SoftwareSaaSSales TechTokyo, JP

和田 哲也(代表取締役CEO)

Co-investorsDIMENSIONHiroshima Venture Capital Co. Ltd.MIRAIDOOR Co. Ltd.Mitsubishi UFJ CapitalMizuho CapitalNippon Venture Capital+1 more

2022年4月 出資prtimes.jp

PR TIMES is a press release distribution service that helps companies distribute news releases to media and the public, with content syndicated across more than 260 partner sites.

Marketing TechMedia & EntertainmentSaaS

Co-investorsAngel Bridge Co.,Ltd.basepartnersDD Holdings Venture CapitalDIMENSIONi Cubed Venturesi-nest capital+7 more

AOI Biosciences株式会社aoibio.com

AOI Biosciences is a Japanese biotech company focused on infectious diseases and autoimmune disorders, combining data analysis technology with proprietary bio-technology.

BiotechHealthtechMedical DevicesIbaraki, JP

末田 伸一(代表取締役 (CEO))in

Co-investorsi-nest capitalNippon Venture CapitalNOW JapanUntroD Capital

bestatbestat-data.com

bestat develops AI algorithms for acquiring, generating, processing, and using 3D data end-to-end, serving manufacturing and civil engineering sites with applications such as digital twins, factory layout simulation, point cloud processing, and robot environment setup.

Advanced ManufacturingAI & Machine LearningDeep Tech

Matsuda(CEO)

Co-investorsDG IncubationOpen Network Lab

Carstay株式会社carstay.jp

Carstay operates a peer-to-peer marketplace in Japan for renting and car-sharing campervans and camping cars, along with space-sharing for overnight vehicle stays.

MarketplacesMobility & TransportationTravel & Hospitality

Co-investorsLifetime VenturesW Inc.

Coetocoeto.co

Coeto operates a platform that facilitates warm, voice-based communication and dialogue to foster human connection and reduce isolation.

ConsumerCreator EconomyMedia & EntertainmentSocialTokyo, JP

Kenji Minato(Representative Director)

GRA&GREENgragreen.comin

GraGreen develops improved crop varieties using genome editing and traditional breeding methods to reduce resource inputs and increase agricultural yields.

AgTechClimate TechNagoya, JP

Masaki Niwain

Co-investorsBeyond Next VenturesKyoto University Innovation CapitalShizuoka CapitalTechstarsUTokyo Innovation Platform Co. Ltd.

Innovation Osakainnovation-osaka.jp

Osaka Innovation Hub (OIH) is a startup support organization that runs programs for entrepreneurs and startups, covering idea development, business incubation, funding, mentoring, and corporate collaboration.

Enterprise SoftwareOsaka, JP

Lancullancul.com

LanCul operates English conversation cafes and digital platforms to help users learn English and experience foreign cultures.

ConsumerCreator EconomyEdTechTokyo, JP

阪野 思遠(Co-founder & CEO)

Levtechlevtech.jp

Levtech operates a platform connecting freelance IT engineers with companies seeking contract work, featuring job matching through both direct search and scout-based recommendations.

B2B MarketplacesFuture of WorkHR TechSaaS

My Sherpamy-sherpa.jpin

My Sherpa (マイシェルパ) is an online counseling service that connects people with counselors to address stress and mental health concerns—such as relationships, work, future worries, and issues related to children—at an early stage.

Digital HealthMental HealthWellness & Fitness

Nexstokyonexstokyo.jp𝕏

NEXs Tokyo is a Tokyo-run startup support program that offers online and offline content and networking opportunities to help startups expand and accelerate their businesses domestically and internationally.

Future of WorkTokyo, JP

Notenote.com𝕏

Japanese media platform where creators publish text, images and audio and readers follow, support and subscribe to them.

Co-investorsDnx VenturesJAFCO GroupOriental Land InnovationsW Inc.

Poco Apoconwpoco-apoconw.com

POCO APOCONW develops hardware-centric solutions for industrial and agricultural applications, with specialization in microcontrollers, network technology, and AI-powered edge devices.

AgTechAI & Machine LearningHardwareHealthtechIoTMedical DevicesKobe, JP

Board武部 秀治

Splyzasplyza.comin𝕏

SPLYZA develops video-analysis technology that visualizes body movement, offering products for sports, education, healthcare/rehabilitation, and manufacturing.

AI & Machine LearningEdTechSaaSSports TechHamamatsu, JP

Hiroyuki Doi(代表取締役 (Representative Director/CEO))in

BoardKiyofumi Ando(取締役 (Director))Joe Waller(取締役 (Director))

Co-investorsShizuoka Capital

Stripestripe.comin𝕏

Stripe provides financial infrastructure for businesses to accept payments, offer financial services, and implement custom revenue models across international markets in 135+ currencies.

Developer ToolsFintechSaaSSan Francisco, US

John Collison(President)inPatrick Collison(CEO)inWilliam Gaybrick(Executive Officer)inGreg Brockman(Founding Engineer, then first CTO)inSarah HeckinRyan Seekely(Engineering Manager)

Co-investors1435 Capital500 GlobalAdvaita CapitalAdventure FundAglae VenturesAir Street Capital+102 more

Sunda Technology Globalsundaglobal.com𝕏

Sunda Technology Global is a Japanese tech company building water infrastructure hardware and sustainable operation-and-maintenance systems for community-shared water facilities such as wells and public taps in Sub-Saharan Africa.

CleantechHardwareImpact & Social GoodIoTTokyo, JP

Co-investorsANOBAKA

TimeCrowdtimecrowd.net

TimeCrowd is a time-tracking and work hours management platform that integrates with calendar and team collaboration tools.

Enterprise SoftwareFuture of WorkHR TechSaaS

Co-investorsLifetime Ventures

Yumeplanningyumeplanning.jp𝕏

JSSA is a Japanese startup support association that provides mentoring from former executives of listed companies, an LP fund for capital strategy and fundraising, and networking with sponsors and advisor companies to help member startups reach IPO or M&A exits.

Future of WorkImpact & Social Good

Takahiro Oka(Representative Director (founder))

スタディストstudist.jp

Studist develops software products and services to help organizations improve and optimize their operations under a "lean operation" approach, including tools for documenting procedures, knowledge sharing, and internal communication.

Enterprise SoftwareFuture of WorkSaaSTokyo, JP

Co-investorsDnx VenturesGlobal BrainHakuhodo DY Ventures

株式会社fruormeetcareer.net

Japanese career-tech company operating meetcareer, a paid career coaching and mentoring service that does not place job listings.

Co-investorsW Inc.W ventures

株式会社YStoryystoryhealth.com

YStory develops AI-powered digital health solutions for women, with a focus on menopause management.

AI & Machine LearningDigital HealthHealthtechTokyo, JP

Janet Yu(CEO (Representative Director))Sherry Shi(CEO (Representative Director))

Co-investorsKyoto University Innovation Capital

Other

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

BiziblCare Link.CoJoyHerSecureNavi株式会社SumatenWachaアラカン 中古車のCtoCプラットフォーム「カババ」を開発、運営カババ (Kababa)ケアリンク (Carelink)

Portfolio news

latest coverage across their companies

Frequently asked questions

How many investments has Seiho Investment Works made?
Seiho Investment Works has 31 tracked investments.
What stage does Seiho Investment Works invest at?
Seiho Investment Works invests at the Seed, Series A stages.
What is Seiho Investment Works's typical check size?
Seiho Investment Works typically writes checks of $67K – $670K.
What sectors does Seiho Investment Works focus on?
Seiho Investment Works focuses on Biotech, Consumer, Deep Tech, Enterprise Software, Healthtech, SaaS, Sector Agnostic.
Where is Seiho Investment Works located?
Seiho Investment Works is headquartered in Kyoto, JP.
Who does Seiho Investment Works co-invest with?
Seiho Investment Works most often shares deals with W Inc., Dnx Ventures, Kyoto University Innovation Capital, among 34 tracked co-investors.

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