RAISE-4
RAISE-4 is a smallsat for technology demonstration developed by Mitsubishi Heavy Industries. Part of the Japanese space agency JAXA's Innovative Satellite Technology Demonstration Program, RAISE-4 carries multiple technologies that were selected for in-orbit demonstration. RAISE-4 was launched on a dedicated Electron rocket flight, 'Raise And Shine' in December 2025.
Overview
RAISE-4 is a reflight of the RAISE-3 satellite which was launched by an Epsilon rocket on 12 October 2022 but failed to reach orbit. As with RAISE-3, RAISE-4 was developed by MHI, the prime contractor of Japan's H-IIA and H3 rockets. MHI also previously developed Z-Sat, a satellite launched in 2021 as part of the Innovative Satellite Technology Demonstration-2 mission. RAISE-4 is operated from MHI's Nagoya Guidance & Propulsion Systems Works plant in Komaki, Aichi.The satellite carries eight of the 16 themes that will be tested in Innovative Satellite Technology Demonstration-4. Among them, five are reflights from RAISE-3, one has its design modified from RAISE-3, and two were newly selected to be flown on RAISE-4.
Spacecraft
As RAISE-4 was deployed into a different orbit than RAISE-3, the thermal design of the satellite was modified.Technologies
Eight technologies are being tested on board RAISE-4.- Low Earth orbit satellite MIMO for 920 MHz band IoT platform
- COTS GPU-based edge-computing for mission systems utilizing model-based systems engineering
- KIR-X
- Takahashi Denki Seisakusho Pulsed-Plasma Thruster
- Membrane deployment deorbit mechanism
- HELIOS-R
- CF-CAM
- Artificial Intelligence Retraining In Space