Startups

Japanese space laser startup Orbital Lasers has closed a $20 million Series A round backed by nine investors including Keio Innovation Initiative and JIC Venture Growth. Spun out from satellite operator SKY Perfect JSAT in 2024, the company develops compact, high-efficiency space lasers for debris removal via laser ablation and high-precision 3D terrain mapping via satellite LiDAR. We explore how it compares to Astroscale and SpaceX, and what it means for Japan's booming space startup ecosystem.

Japan's Power Diamond Systems, a Waseda University spinoff, achieved the world's first 200V/1A switching operation with a diamond MOSFET. With 550V breakdown voltage and 0.8A drain current in a single device, diamond semiconductors could surpass SiC and GaN as the ultimate power semiconductor for EVs and renewable energy.

Japanese fusion startup Helical Fusion has announced that Phase 1 of its final demonstration device Helix HARUKA will be built at the National Institute for Fusion Science (NIFS). With energization tests planned for 2027, the company is betting on Japan's unique helical approach to beat global rivals including Commonwealth Fusion Systems and TAE Technologies in the race to commercial fusion power.

Quemix CEO Yuichiro Matsushita achieved a world-first in quantum chemistry simulation on Japan's Fugaku supercomputer. This report explores how researcher autonomy drove the breakthrough, Quemix's partnerships with Honda and Asahi Kasei, and Japan's growing quantum startup ecosystem including QunaSys and Fixstars Amplify.

Spider silk — five times stronger than steel by weight — is finally becoming a mass-produced reality. U.S.-based Kraig Biocraft targets 10 tons per month while Japan's Spiber partners with 45+ brands. Explore Super Silk's potential in fashion, medicine, and defense, and how this bio-revolution is unfolding.

Japanese startup Orizuru Therapeutics has begun clinical trials transplanting iPS cell-derived islet cells into diabetes patients. The first-ever transplant surgery succeeded in February 2025, with company-sponsored trials planned in Japan and the US. Over a decade after Professor Yamanaka's Nobel Prize, Japan's regenerative medicine enters the practical stage.

Japanese space startup Astroscale has announced its ISSA-J1 mission to realize a 'space safety patrol' service in orbit. As the space debris crisis intensifies with over 130 million pieces of junk circling Earth, this article explores how Astroscale's first-mover advantage in on-orbit servicing compares to rivals like ClearSpace and SpaceX, and what it means for Japan's growing space industry.

Japan's first two-story 3D-printed house "Stealth House" has been completed in Miyagi Prefecture, built by startups KIZUKI and ONOCOM with 20+ collaborating companies. As Japan's construction industry faces a severe labor shortage with 200,000+ fewer workers since 1997, multiple firms including Serendix and Lib Work are accelerating 3D concrete printing technology. We compare with U.S. giant ICON, explore Japan's strict building code compliance, and examine cost advantages.

Sakana AI, the Tokyo-based startup founded by former Google researchers, has raised $135M to reach a record $2.65B valuation — making it Japan's top unicorn. Citibank made its first-ever strategic investment in a Japanese company through this round. With backing from the CIA's venture arm and Google, Sakana is spearheading Japan's push for sovereign AI.