15th Rock

15th Rock is a venture capital investment firm established in 2019 and based in Tokyo, Japan. The company specializes in seed and pre-IPO investments, primarily focusing on the fields of human augmentation and information technology. It aims to create a better future and enhance quality of life in light of the increasing longevity of individuals, targeting sectors such as robotics, electronics, augmented and virtual reality, brain-machine interfaces, and biotechnology. By investing in innovative companies within these domains, 15th Rock endeavors to contribute to advancements that support a fulfilling life in the era of the 100-year lifespan.

Hayashizaki Wataru

Principal

21 past transactions

Nobi

Series B in 2025
Nobi is a smart lamp that ensures help can be provided in a flash in the event of a fall. It recognizes a fall, and it will notify a family member, contacts, or a specialized emergency call center. The lamp will then connect to that person to reassure them that help is on the way. If necessary, it can even unlock the smart lock on the front door.

Ripcord

Venture Round in 2024
Ripcord, Inc. is a robotic digitization company founded in 2014 and headquartered in Los Angeles, California. The company specializes in creating a platform for paperless document management, utilizing advanced technologies such as artificial intelligence, machine learning, and vision-guided robotics. Their primary product, Canopy, employs automation software to capture, enrich, and organize essential content, effectively creating a digital twin of information. By integrating sensors and software automation, Ripcord enables enterprises to enhance their business processes, improving speed, quality, and accuracy in managing important documents. The company, originally known as Ripcord Digital, Inc., rebranded in June 2017 to reflect its focus on innovative digitization solutions.

JIZAIE

Series A in 2024
JIZAIE is an artificial intelligence firm that wants to combine VR, robots, and wearable computing to create solution.

Onera Health

Series C in 2024
Onera Health, Inc. specializes in providing innovative sleep diagnostic solutions and services aimed at identifying sleep disorders such as insomnia, sleep apnea, and narcolepsy. Founded in 2017 and headquartered in Palo Alto, California, with a research and development office in Eindhoven, the Netherlands, Onera Health has developed advanced sleep diagnostic patch systems that collect and analyze sleep data. These systems not only enhance the diagnosis of sleep-related ailments but also have potential applications in monitoring various chronic health conditions. By delivering comprehensive sleep test data to healthcare providers, Onera Health aims to improve patient care and reduce healthcare costs, ultimately enhancing the health and quality of life for individuals globally.

Better Place

Series B in 2023
Better Place operates a pension fund focused on the welfare and medical sectors. The company manages a defined benefit pension system designed to support the financial well-being of individuals who contribute to societal development, particularly in areas like childcare and long-term care. This approach allows clients to ensure their employees' financial security after retirement, fostering a supportive environment that aligns with Better Place's vision of promoting kindness and enabling individuals to work without financial concerns.

Paradromics

Series A in 2023
Paradromics, Inc. is focused on developing advanced brain-machine interfaces aimed at enhancing communication between the brain and external devices, particularly for individuals with neurodegenerative diseases. The company specializes in creating implantable systems that facilitate neural data decoding, allowing complex brain signals to be translated into data streams suitable for various neural prostheses. Paradromics is dedicated to providing high data-rate brain-computer interface technology that supports bidirectional data transmission, enabling patients to regain functionality lost due to neurological conditions. Founded in 2015, the company is headquartered in Austin, Texas.

Petokoto

Series A in 2021
Petokoto is a pet wellness company that creates and sells fresh food, runs pet media, and keeps pets happy. It is suitable to become an information source that combines accuracy, completeness, and updateability by utilizing the collective knowledge of experts both inside and outside the company and demonstrating their respective expertise. The company aims to develop a world where pets can be loved as family members.

Bisu

Seed Round in 2021
Bisu is a health technology company that offers a home health lab designed to enhance personal well-being through urine and saliva tests. Its devices monitor various health metrics, including dietary health, fat metabolism, and hydration levels, providing users with daily feedback on electrolytes, hydration, pH, ketones, and uric acid via a mobile application. This functionality enables individuals to track burned body fat, maintain metabolic health, achieve optimal ketosis, and improve physical endurance. Bisu has received recognition for its innovation, having been awarded by prestigious organizations such as Johnson & Johnson Innovation and MedTech Innovator, and it gained further acclaim at CES 2020 with the IHS Markit Innovation Award.

Onera Health

Series B in 2021
Onera Health, Inc. specializes in providing innovative sleep diagnostic solutions and services aimed at identifying sleep disorders such as insomnia, sleep apnea, and narcolepsy. Founded in 2017 and headquartered in Palo Alto, California, with a research and development office in Eindhoven, the Netherlands, Onera Health has developed advanced sleep diagnostic patch systems that collect and analyze sleep data. These systems not only enhance the diagnosis of sleep-related ailments but also have potential applications in monitoring various chronic health conditions. By delivering comprehensive sleep test data to healthcare providers, Onera Health aims to improve patient care and reduce healthcare costs, ultimately enhancing the health and quality of life for individuals globally.

TENT Japan

Venture Round in 2021
TENT Japan operates an online platform that specializes in the rental of outdoor equipment and camping tents. The company focuses on providing a comprehensive product management and distribution system, alongside a rental-only inventory management tool that employs Radio-Frequency Identification (RFID) technology. This innovative approach aims to reduce the barriers to purchasing outdoor gear, promote sustainable consumption, and help minimize waste of goods and resources. Through its services, TENT Japan seeks to facilitate outdoor experiences while encouraging environmentally responsible practices.

Additive Manufacturing Technologies

Series A in 2021
Additive Manufacturing Technologies (AMT) specializes in automated post-processing technology aimed at enhancing the efficiency of additive manufacturing operations. The company's flagship platform, PostPro, significantly improves the cost, quality, safety, and throughput involved in the production of 3D printed parts. By automating the traditionally manual and expensive post-production steps, AMT enables manufacturers to transition their facilities into high-volume production lines. This innovative approach not only accelerates lead times but also reduces overall manufacturing costs, making it an attractive solution for clients looking to scale their additive manufacturing capabilities.

Longan Vision

Seed Round in 2020
Longan Vision specializes in developing augmented reality technology for first responders, primarily through its flagship product, the Fusion Vision System (FVS). This innovative helmet-mounted device enhances visual capabilities by integrating thermal information, allowing users to navigate challenging environments such as smoke-filled or low-visibility areas efficiently. The FVS features advanced functions like AI target highlights, edge detection, environmental monitoring, and fire source detection. These capabilities empower firefighters and other emergency personnel to see through smoke, locate victims, and identify fire sources while keeping their hands free to perform life-saving tasks. Longan Vision’s commitment to enhancing the operational effectiveness and safety of first responders positions it as a leader in the field of emergency response technology.

Sun Asterisk

Venture Round in 2020
Sun Asterisk is a digital creative studio that focuses on promoting industrial digitalization. The company offers support to startups through various methodologies, including design thinking, lean startup principles, agile development, and the use of original DevOps tools. Additionally, Sun Asterisk provides recruiting services, helping to connect talent with organizations in need of skilled professionals. With a commitment to innovation and efficiency, the company aims to facilitate the digital transformation of businesses across various sectors.

Gojo & Company

Series C in 2019
Gojo & Company Inc. is a holding company based in Tokyo, Japan, that focuses on enhancing financial inclusion for underserved communities. Founded in 2014, the company operates through subsidiaries, including Microfinance Delta International and Sejaya Micro Credit, providing microfinance services. Gojo partners with financial service providers across 13 countries in Southeast Asia, South Asia, Central Asia, the Caucasus, and Africa. The company aims to empower individuals to improve their circumstances and achieve financial independence by ensuring access to quality and affordable financial services in developing regions.
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