Participated · Seed · Apr 2026

Founded in July 2024, Qubitcore builds on OIST research to integrate ion-trap quantum processors with micro optical resonators to enable high‑efficiency photon–qubit interfaces and multi-module optical connections. The company aims to realize fault-tolerant quantum computers via a distributed quantum computing architecture and holds an exclusive license with OIST signed in July 2025. Its roadmap targets a cloud-accessible quantum computer prototype operating at OIST in 2026, an Early‑FTQC with error‑correction capabilities by 2028, and a second‑generation multi‑QPU optically connected system by 2029. Qubitcore has strengthened its financial position through a ¥1.53 billion seed round led by SBI Investment, following a pre-seed in January 2025, and plans to deploy funds into R&D, partner/validation activities, and hiring. The company operates its headquarters in Yokohama with R&D facilities and labs based at OIST in Okinawa.

Participated · Series B · Feb 2024

Cuebus offers CUEBUS, a linear-motor-driven, unit-structured urban multi-story robotic warehouse system that can be flexibly and immediately installed from large warehouses to narrow urban sites. Its modular unit design keeps initial investment low, making adoption feasible for small and medium-sized companies. Cuebus says the system improves logistics productivity and helps address labor shortages through automation. The company is developing hardware, software, and applications with the goal of making CUEBUS a platform for living-area logistics. As of the latest disclosed figures, Cuebus has raised a cumulative ¥390M.

Led · Series C · Nov 2023

RUTILEA builds zero-code AI products to automate business processes and make high-precision AI immediately usable. Since founding in 2018, the company has focused on solving data shortages in AI adoption by leveraging generative AI and foundation models and simplifying complex implementation through zero-code. Its offerings aim to improve labor productivity by enabling rapid AI deployment in business workflows. The company plans to invest in new businesses, accelerate product R&D, construct recurring-revenue models, and expand sales and engineering hires. As of October 31, 2023, its stated capital (including capital reserve) was ¥946 million, and cumulative funding after the latest round is about ¥1.2 billion. RUTILEA is headquartered in Kyoto and led by CEO Takafumi Yano. RUTILEA offers zero-code AI products designed to simplify AI adoption and automate business processes to improve labor productivity. The company uses generative AI and foundation models to address data shortages that commonly hinder AI implementation and delivers solutions in a ready-to-use form. Since its founding in August 2018, RUTILEA has focused on making the AI introduction process simple through zero-code interfaces. The company plans to invest in new business initiatives, continue product R&D, build recurring-revenue models, and expand sales and engineering headcount. Financially, after a Series C1 in August 2023 the company reports cumulative funding of about ¥900M and capital (including reserves) of ¥675M as of 2023-09-01. RUTILEA is headquartered in Kyoto.

Participated · Seed · Feb 2023

Mawari develops interactive real-time 3D rendering and XR streaming technology centered on the Mawari Engine, a patent-pending 3D Streaming CODEC and split-rendering architecture. The company is building the Mawari Network, a decentralized XR content delivery platform powered by a distributed network of GPU nodes to enable delivery at scale. Mawari plans to expand its R&D team and accelerate the public launch of the Mawari Network. Financially, the company closed an oversubscribed $6.5 million seed round to fund those efforts; it had been self-funded/bootstrapped since founding in 2017. Mawari reports over 40 deployments worldwide and lists customers and partners including 8th Wall, BMW, Ericsson, KDDI, Immersal, Niantic, Qualcomm, Sapporo Breweries and T-Mobile. The company is presented in the article as based in San Jose, California.

Participated · Series B · Feb 2021

Mighty Buildings develops 3D-printed, prefab kits and factory-built components for residential construction, using a proprietary material made of 60% recycled glass. The company manufactures parts off-site using ultraviolet curing and microfactories to enable rapid, repeatable production and automotive-grade quality control. Its printed material is described as stronger and lighter than concrete, rated for winds up to 150 mph, and compliant with California building codes including Title 24 energy requirements. Mighty shifted from selling homes directly to selling whole communities and kits to developers, aiming for larger-scale projects. The company reported roughly $5 million in revenue in 2022 and says it has a pipeline of projects in the U.S., Caribbean and Middle East potentially worth “hundreds of millions.” Mighty Buildings, based in Oakland, CA, develops construction technologies that combine 3D printing, robotics, and advanced composite materials to create panelized building systems and modular homes. The company produces a range of projects from pre-designed ADUs to single-family developments using its Mighty Kit System. Mighty Buildings is building a network of micro-factories intended to produce 200–300 homes per year in locations with housing gaps. Leadership includes CEO Slava Solonitsyn and Chief Sustainability Officer Sam Ruben. The company is pursuing a carbon neutrality roadmap that emphasizes high-throughput sustainable micro-factories, strategic supply-chain partnerships, blue-skies technology research, and new composite materials made from recycled or bio-based feedstock. As of the article, Mighty Buildings had raised a total of $100M to date. Mighty Buildings is an Oakland-based construction technology company that 3D-prints prefabricated homes and accessory dwelling units using robotics, automation and a proprietary thermoset composite called Light Stone Material (LSM). The company says its process can 3D print a 350-square-foot studio in 24 hours, operate two times faster with 95% less labor hours and produce 10-times less waste than conventional construction, and automate up to 80% of the construction process through robotic post-processing and automated insulation pouring. It manufactures panelized 3D-printed exterior shells and prefabricates certain modules (like bathrooms) in a 79,000-square-foot Oakland production facility and is currently building only in California. Mighty Houses, its single-family product line, ranges from 864 to 1,440 square feet with estimated prices of $304,000 to $420,500, and the company has produced and installed a number of ADUs and secured developer contracts. The company plans to scale production capacity and automation with the new capital, market a Mighty Kit System and a new fiber-reinforced material for multi-story projects, and develop a B2B platform to offer production-as-a-service to builders and developers. Mighty Buildings launched out of stealth last August, is a four-year-old startup and has been included on Y Combinator’s Top Companies list; the company declined to reveal its current valuation. Mighty Buildings provides a production-as-a-service platform that combines 3D printing and prefab techniques to automate up to 80% of the building process. Its factory-driven approach can 3D-print components, panels, and full-size volumetric modules, and a 350-square-foot studio unit can be printed in under 24 hours. The company reports building with 95% fewer labor hours, at double the speed of conventional construction, and producing 10x less waste; its homes cost up to 45% less than comparable traditional homes, with automated production costs 20–30% lower than traditional prefab. Mighty Buildings is certified under California’s Factory Built Housing program and was first to achieve UL 3401 certification for 3D-printed building structures and assemblies. It has installed its first two accessory dwelling units in San Ramon and San Diego and says it is ready to scale production. The company graduated from Y Combinator in winter 2018 and is launching out of stealth from San Francisco.