Fundraising Fox

15th Rock

Venture capital

Yokohama · Seed–Late Stage · 8 people tracked

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Investment thesis

15th Rock is a venture capital firm focused on 'human augmentation,' backing technologies that use the power of technology to expand the abilities considered normal for humans today — imagining futures where people might control anything by thought alone, fly, or become invisible. The firm believes that achieving unparalleled success in the vast ocean of startups requires doing something different from others, but that this differentiation must also be correct.

Source: firm website, verified Aug 3, 2026.

Stage
Seed–Late Stage
HQ
Yokohama, JP
Instruments
Equity
Founded
2019
Tracked investments
53

Team · 8 people

from the firm's website

What they invest in

from 28 of 53 portfolio companies

AI & Machine Learning ×10Healthtech ×9Deep Tech ×8Hardware ×6Digital Health ×5Fintech ×5Robotics ×4Biotech ×3

HQs:Japan×14United States×4Canada×1Netherlands×1

Who they back

founder profiles across 9 portfolio companies
44%
solo founders
4 of 9 mapped founding teams

Founding team size:solo founder×42 founders×43 founders×1

Accelerator rootsportfolio companies that came through a program

Techstars ×2

Investments · 53 tracked

founders shown can be your intro path

By year:2025 · 12024 · 12 dated

Agri-fintech for African smallholder farmers
Amtechnologiesamtechnologies.com
Biometric data productivity calendar app
BLOOMLIFEbloomlife.comin𝕏

Bloomlife provides a remote patient monitoring platform for high-risk patient populations, offering customizable clinical protocols and smart notifications that help care teams identify patients in need and address potential complications early.

Digital HealthFemTechHealthtechSan Francisco, US

Julien Penders(Executive Officer, Director)inEric Dy(Executive Officer, Director)inYoung Sohn(Director)Max Mirgoli(Director)Lucio Lanza(Director)

BoardUriridiakoghene Onovakpuri(Director)

Co-investorsForeground CapitalGATHER VENTURESHealthtech CapitalPallasite VenturesSuncoast VenturesThe Chernin Group (TCG Crypto)

Canaerycanaery.comin

Canaery (now General Sense) is developing scent-detection technology aimed at extending capabilities beyond the limits of human olfactory perception.

Deep TechHardware

Co-investorsGood News VenturesBreakout VenturesDolby Family VenturesKdT Ventures

Cellidcellid.comin

Cellid is a fabless company developing AR glasses displays (waveguides) and spatial recognition engines for next-generation devices.

AI & Machine LearningDeep TechHardwareRoppongi, JP

Ken Shirakami(Representative Director & CEO)SATOSHI SHIRAGA(Founder)inKen Shiragami(Representative Director & CEO)

Co-investorsGlobal BrainTechstarsTEL Venture Capital, Inc.Development Bank of JapanFFG Venture Business PartnersIMM Investment+2 more

Degas 🇯🇵degasafrica.com

Degas operates a farmer finance platform that connects African smallholder farmers to credit, inputs, training, and markets, and a geospatial AI business that builds foundation models trained on satellite imagery.

AgTechAI & Machine LearningFintech

Co-investorsInclusion Japan

Digital creative studio
Ejentaejenta.comin𝕏

Ejenta builds an agentic AI platform for connected care that delivers intelligent healthcare solutions to patient homes and manages care for members with chronic conditions like heart failure.

AI & Machine LearningDigital HealthHealthtechSan Francisco, US

Rachna Dhamija(CEO)

Co-investorsaVentureCity LightTechstarsYamaha Motor Ventures

Entertainment creative technology company
Ghoonutsghoonuts.com

Ghoonuts is a deep-tech venture developing treatments that target brain function, focused on aphasia as an unmet medical need.

BiotechDeep TechHealthtech

Gojo Companygojo.coin

Gojo & Company is a Japan-based financial inclusion group that invests in and operates microfinance institutions, banks, and fintech companies across Asia and Africa to expand access to financial services for underserved clients.

Enterprise SoftwareFintechImpact & Social GoodSaaSTokyo, JP

Taejun Shin(Co-founder, Managing Partner & CEO)Sanjay Gandhi(Co-founder & CIO)Arnaud Ventura(Managing Partner)Kohei Katada(Managing Partner / CFO)Gurol Michael Sari(Chief Operating Officer)Takao Takahashi(Chief People & Inclusion Officer)

Co-investorsBeyond Next VenturesDIMENSIONFujitsu VenturesGlobis Capital PartnersGMO VenturePartnersKDDI Open Innovation Fund+3 more

Industrial 3D printer finishing equipment
Lifestacklifestack.aiin𝕏

Lifestack is an AI daily planner app that reads sleep, recovery, and focus data from wearables and syncs with calendars to schedule tasks, meals, and rest around a user's energy levels.

AI & Machine LearningConsumerWellness & Fitness

Longan Vision Corplonganvision.comin𝕏

Longan Vision develops the Fusion Vision System, a helmet-mounted thermal imaging and augmented reality device that provides firefighters with hands-free, real-time situational awareness in smoke-filled and low-visibility conditions.

Deep TechHardwareIoT

Co-investorsInnovative Solutions Canada

Mechasysmechasys.ca

Mechasys develops an XR Projector for the construction industry, providing robotics and advanced layout solutions to improve field productivity and worker efficiency on construction sites.

Construction TechHardwareRoboticsMontreal, CA

Co-investorsGlobal BrainNew Stack VenturesAgya VenturesFondactionSOSVToda

Medical remote monitoring system
Microfinance provider in developing countries
Mountaineering and outdoor app/web service
Neurotech device for digital scent
Next-generation electric wheelchair
Nextnewworldnextnewworld.co

NEXT NEW WORLD is a Japanese company developing silk protein technology, centered on its patented "Karada Silk" process that turns silk into a water-soluble solution while preserving its nano-scale porous structure for adsorption and cosmetic benefits.

BiotechHealthtechNew Materials

Nobinobi.lifeJan 2025 · $37M

Nobi makes AI-powered smart lamps for senior living and residential care communities that detect falls within seconds, alert caregivers, and help prevent falls through smart lighting and real-time notifications.

AI & Machine LearningHealthtechIoT

Co-investorsEQT Life SciencesAngelini VenturesPMV

Onera Healthonerahealth.comin

Onera Health provides clinical-grade remote diagnostics and monitoring solutions for healthcare professionals, with an initial focus on sleep health.

Digital HealthHealthtechMedical DevicesEindhoven, NL

Co-investorsEQT Life SciencesLSP (Life Sciences Partners)imec.xpandInnovation Industries

Online telemedicine internet hospital
Outdoor equipment rental EC mall
Pacific Meta Marketing/Consultingpacific-meta.co.jpin𝕏

Pacific Meta provides blockchain and AI services including strategy, development, implementation, digital asset management, and global expansion support for businesses.

AI & Machine LearningCrypto & Web3Fintech

Kousei Sho(Co-Founder)Kazuhito Azechi(Co-Founder)Shota Iwasaki(CEO)

Co-investorsHyperithm

Paradromics Turning Data Into Medicineparadromics.comin𝕏

Paradromics develops a brain-computer interface (BCI) system, with FDA Breakthrough Device Designations for speech decoding and digital device control, and works with academic medical institutions on translational BCI research.

BiotechDeep TechHealthtechMedical DevicesAustin, US

Matt Angle(Founder and CEO)in

Co-investorsAlpha EdisonAnthropy PartnersCapital FactoryCoastCapFrontier Path VCFusion+14 more

Perovskite solar cell technology development
Personal stylist EC mall
Pet wellness brand
ProtonIntelprotonintelligence.comin

Proton Intelligence develops CKM™, a continuous monitoring medical device drawing on biosensing and minimally invasive microdevice technology for clinical use.

Deep TechDigital HealthHealthtechMedical Devices

Co-investorsAIN VenturesLongeVCTenmile

Remote work platform
Ripcordripcord.comin𝕏Apr 2024 · $32M

Ripcord uses robotics and AI to digitize paper documents and extract data, transforming unstructured information into accessible, structured digital files for enterprise use.

AI & Machine LearningEnterprise SoftwareHardwareRobotics

Alex Fielding(Director & Ripcord Co-Founder)Sam Fahmy(CEO and President)

Co-investorsIcon VenturesKleiner PerkinsCatapult VenturesComet LabsHemisphere Ventures LLCLux Capital+9 more

Robust AIrobust.aiin

Robust.AI develops AI and robotics technology with a focus on human-centered design.

AI & Machine LearningDeep TechLogistics & Supply ChainRoboticsVista, US

Anthony Jules(Founder)inRodney BrooksinLeila TakayamaGabrielle Halbergin

Co-investorsEnergy Impact PartnersFontinalis PartnersFuture VenturesJAZZ Venture PartnersMetaplanetPlayground Global+1 more

Siiibo証券株式会社siiibo.com𝕏

Siiibo (branded Metaplanet Securities) operates a brokerage platform that lets investors buy corporate bonds issued by mid-to-late-stage startups and emerging-market listed companies.

Fintech

Co-investorsAngel Bridge Co.,Ltd.Beta venture capitalDnx VenturesRelicAozora Corporate Investment

Small vessel autonomous navigation system
Spiretespirete.com

Spirete is a Japanese startup studio that co-creates new companies from zero, building ventures around business ideas and technology seeds entrusted by large corporations and university research institutions.

AgTechDeep TechEnergy

Startup studio for zero-to-one creation
Stylealertstylealert.co
Sun Asterisksun-asterisk.com

Sun* is a digital creative studio that provides product development, DX (digital transformation), and new-business creation services, including AI-driven modernization and AI agent solutions.

AI & Machine LearningDeveloper ToolsEnterprise Software

Co-investorsSony Ventures CorporationSony Network Communications

Tdrk Inc.Cotdrk-inc.co.jp
TENET 🇯🇵tenet.co.jp

TENET is a Japanese healthcare company building a new type of general-practice clinic that combines AI, online consultation, and comprehensive primary care.

AI & Machine LearningDigital HealthHealthtech

花房 弘也(代表取締役 CEO)武田 政則(総合診療クリニック統括責任者)佐藤 暁幸(Chief Medical Officer)

Co-investorsGMO VenturePartnersHiroshima Venture Capital Co. Ltd.NOW Japan

Tent 🇯🇵tent-inc.jp𝕏

TENT Inc. builds cloud-based rental and subscription systems for retailers and manufacturers, including a rental platform (Kauriru), a rental-focused inventory management system using RFID and QR codes, and item lending/return tracking tools.

Logistics & Supply ChainRetail TechSaaSTokyo, JP

松田 基臣(代表取締役 (CEO))

Co-investorsJR East Start UP

Web3 project strategy consulting firm
WHILLwhill.inc

WHILL designs personal electric mobility devices, including power chairs, electric wheelchairs, and mobility scooters, along with an autonomous self-driving service that transports passengers through airports and public spaces.

HardwareMobility & TransportationRoboticsTokyo, JP

Junpei NaitoKenji GohoMuneaki FukuokaSatoshi Sugie

Co-investors500 GlobalMCP Asset ManagementNippon Venture CapitalPayforwardShizuoka CapitalEight Roads Ventures+2 more

Yamapyamap.com𝕏

YAMAP is a hiking and outdoor app that shows a user's current location on trail maps even without cell signal, helping prevent getting lost.

ConsumerMobility & TransportationSocial

Co-investorsOita Venture CapitalSMBC Venture Capital

エネコートテクノロジーズenecoat.com𝕏

EneCoat Technologies develops and manufactures perovskite solar cells (PSCs) and related materials.

CleantechEnergyNew MaterialsKyoto, JP

加藤尚哉 (Naoya Kato)(Representative Director / Executive Officer / CEO)堀内保 (Tamotsu Horiuchi)(Director / Executive Officer / CTO)

Co-investorsGlobal BrainKyoto University Innovation CapitalMIRAI SOUZOUMonozukuri VenturesNippon Venture Capital

株式会社PETOKOTOpetokoto.com𝕏

PETOKOTO operates a Japanese-language media site about living with dogs and cats, covering topics like adopting rescue pets, pet-friendly accommodations, cat breeds, and pet goods.

ConsumerDirect to ConsumerMedia & Entertainment

Co-investorsAPOLLO CAPITALColopl NextJR East Start UPGenesia Ventures

株式会社ベター・プレイスbpcom.jp𝕏

Better Place operates "Hagukumi Corporate Pension" (a defined-benefit corporate pension plan), handling enrollment administration, plan design, and implementation support for member companies.

FintechHR Tech

Morimoto(Representative (CEO))

Co-investorsIyogin CapitalOita Venture CapitalUTokyo Innovation Platform Co. Ltd.

Portfolio news

latest coverage across their companies

Frequently asked questions

How many investments has 15th Rock made?
15th Rock has 53 tracked investments, including 1 dated in the last 24 months.
What stage does 15th Rock invest at?
15th Rock invests at the Seed, Late Stage stages.
What sectors does 15th Rock focus on?
15th Rock focuses on AI & Machine Learning, Consumer, Deep Tech, Hardware.
Where is 15th Rock located?
15th Rock is headquartered in Yokohama, JP.
Who does 15th Rock co-invest with?
15th Rock most often shares deals with Global Brain, Hiroshima Venture Capital Co. Ltd., KDDI Open Innovation Fund, among 85 tracked co-investors.

Images

15th Rock photo15th Rock photo

Co-investors · 1

Prime Movers Lab

Prime Movers Lab is an early-stage venture capital firm that invests in startups advancing breakthrough scientific and engineering innovations.

$2M – $30M

Firms observed investing alongside 15th Rock, from public investor directories. Shared companies are the overlap with 15th Rock's recorded portfolio.

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