Value chain · CLM-1249
In plain terms
Japan's December 2025 space roadmap plans to launch a solar power demonstration satellite, OHISAMA, on a private Kairos rocket in the year from April 2026, to beam power from low orbit to the ground.
The claim as recorded
The FY2025 revision of Japan's space roadmap, decided on 2025-12-23, plans (our translation) the launch and in-orbit demonstration of an SSPS demonstration satellite from FY2026, and R&D aimed at demonstrating energy transmission from low Earth orbit to the ground around FY2026. It also plans an in-orbit demonstration of large space-structure construction technology. Its launch chart places the SSPS demonstration satellite OHISAMA on a Kairos rocket in FY2026, which it marks as a current target that may change.
Evidence behind this: T3, a government roadmap's stated plan; it permits "the roadmap plans Y from date Z" only, not that the launch is funded or will keep to schedule.
Scope and limits
A plan, not a commitment: no power level, distance, orbit altitude, budget or date for any grid-connected or commercial system is given, so QST-027's first-power year and rating stay unanswered for Japan. FY2026 is Japan's fiscal year, April 2026 to March 2027. The Kairos rocket's own readiness is outside this source. The launch mark's column was read from a render, not the text layer.
What it assumes
No assumptions are recorded against this claim.
Where it comes from
text, PDF p.39 (printed p.37), heading 【宇宙太陽光発電の研究開発】, our translation, paraphrased except where quoted: on the basis of the SSPS R&D roadmap, work towards future long-distance high-power wireless power and a drastic cut in space transport cost, and launch and in-orbit demonstration of the demonstration satellite from FY2026 ("2026年度以降の実証衛星の打ち上げ、軌道実証を行う"); in-orbit demonstration of large space-structure construction; R&D aiming at a demonstration of energy transmission from low Earth orbit to the ground around FY2026 (2026年度を目途). PDF p.51 (printed p.49), launch chart, domestic private rockets row: 宇宙太陽光発電システム（SSPS）実証衛星（OHISAMA）（カイロスロケット）, marked in the 令和8年度 (FY2026) column (render extract/derived/SRC-625/render/p0051@1.5.png); footnote: each launch-year mark is the current target and may be affected by various factors.
Related records
- Answers question
- QST-027 not published in this release
Cite this
energyaperture.com/c/clm-1249
CLM-1249, Energy Aperture, as of 2025-12-23.
Connected records
Other published records linked to this one. A list, not a judgement.