15th Rock
Venture capitalYokohama Β· SeedβLate Stage Β· 8 people tracked
Investment thesis
15th Rock targets companies expanding human capabilities through technology, operating across two primary domains: Human Augmentation (primarily hardware) and Consumer Service 3.0 (primarily software). The firm believes technology can enhance fundamental human abilities and enable new lifestyles beyond current constraints. Investors engage across stages from seed through pre-IPO, actively underwriting bridge financing. Portfolio support extends through an affiliated startup studio (Spirete) offering value-add services including corporate partnerships, executive recruitment, specialized advisory networks, and international expansion support across Japan, Silicon Valley, Asia, and Europe.
Source: firm website, verified Jul 21, 2026.
Team Β· 8 people
from the firm's websiteWhat they invest in
from 7 of 53 portfolio companiesAI & Machine Learning Γ3Healthtech Γ3Robotics Γ3Deep Tech Γ2Digital Health Γ2Hardware Γ2Medical Devices Γ2Cleantech Γ1
HQs:JapanΓ2United StatesΓ2CanadaΓ1NetherlandsΓ1
Investments Β· 53 tracked
founders shown can be your intro pathEjenta 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. The company partners with health plans and healthcare organizations to enable remote monitoring and intelligent care delivery.
AI & Machine LearningDigital HealthHealthtechSan Francisco, US
Rachna Dhamija(CEO)
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
Onera Health provides clinical-grade remote diagnostics and monitoring solutions for healthcare professionals, with an initial focus on sleep health. The company operates globally and aims to make remote health monitoring accessible and user-friendly.
Digital HealthHealthtechMedical DevicesEindhoven, NL
Proton Intelligence develops a minimally invasive sensor that continuously monitors potassium levels in blood to improve care for patients with heart failure and chronic kidney disease.
Deep TechHealthtechMedical Devices
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
Sam Fahmy(CEO and President)Alex Fielding(Director & Ripcord Co-Founder)
Robust.AI develops AI and robotics technology with a focus on human-centered design. The company builds expertise in artificial intelligence, robotics systems, and human-robot interaction.
AI & Machine LearningDeep TechLogistics & Supply ChainRoboticsVista, US
Anthony JulesRodney BrooksLeila TakayamaGabrielle Halberg
EneCoat Technologies develops and manufactures perovskite solar cells (PSCs) and related materials. The company specializes in advanced solar cell technology and materials for the renewable energy sector.
CleantechEnergyNew MaterialsKyoto, JP
ε θ€ε°ε (Naoya Kato)(Representative Director / Executive Officer / CEO)ε ε δΏ (Tamotsu Horiuchi)(Director / Executive Officer / CTO)
Frequently asked questions
- 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.
- Where is 15th Rock located?
- 15th Rock is headquartered in Yokohama, JP.
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