$ASTS A quick primer on the J-LEO ("Japan's Starlink") Solicitation and Award that we (Spacemob) think is coming soon.
Japan is looking to build out a nationwide D2D network and is looking to provide up to $1B in funding to support the network's rollout (the winner is expected to actually help contribute to the buildout roughly 50/50).
Here are the primary goals as outlined in their public solicitation (edited obviously):
1. Japan-controlled autonomy: The LEO satellite constellation must be owned, operated, and managed by the Japanese implementing entity (indirect subsidy recipient). All critical ground facilities (gateways, satellite control/SOC, payload control/POC, network ops/NOC, etc.) must be located in Japan. Spectrum coordination via MIC/ITU must be handled appropriately.
2. Nationwide direct-to-smartphone service: By end of March 2029 (end of FY2030 in Japanese fiscal terms), provide satellite direct communication (D2C/D2D) service using mobile phone frequencies to unmodified standard smartphones, available to general users across Japan (including remote areas).
3. High availability/performance during project term: During the project period, achieve infrastructure enabling video calls (broadband-capable) for at least ~70% of the day (roughly 16 hours) across Japan. Post-project, plan to scale toward continuous nationwide coverage through further investment.
4. Disaster resilience & roaming support: Enable satellite-based roaming (full roaming mode, excluding emergency calls in some contexts) for inter-carrier disaster relief scenarios. Provide voice, data, and SMS at no charge (or equivalent relief) to affected carriers/users during activations, aligned with MIC guidelines (MIC is the Japanese version of the FCC).
5. Post-project sustainability & domestic development: Maintain at least the completion-level service for 5 years after project end. Develop and report plans for transitioning toward domestic satellite manufacturing, launches, and operations over time (Seems more likely that AST would be able to launch out of Japan with Mitsubishi since it is launch-neutral. Also, AST at least at one time, was heavily reliant on NEC for Satellite modules
ast-science.com/nec-to-manuf…, maybe nearby production could be possible).
The race at least appears to be down to two primary options at this point:
Starlink/SpaceX: Partnership with KDDI (major Japanese MNO, already using Starlink for backhaul and initial D2C).
AST SpaceMobile: Partnership with Rakuten Mobile (strategic investor/partner since 2020, Japan's newest MNO - smaller than KDDI).
Points favoring Starlink/SpaceX winning
Proven scale & deployment: Starlink has a massive operational fixed wireless constellation and smaller dtc constellation, rapid launches, and real-world reliability (disaster use globally, including Japan partnerships). KDDI already has live D2C service.
Commercial momentum: Strong existing ties with KDDI; faster path to expanded coverage using current tech. Starlink's global track record for broadband and resilience.
Operator strength: KDDI is a established major player with robust infrastructure/finances vs. Rakuten's debt challenges.
Government/military familiarity: Japan’s Self-Defense Forces have tested Starlink; practical experience in the country.
Points favoring AST SpaceMobile/Rakuten winning
Technical fit for requirements: AST demonstrated higher-bandwidth broadband/video calls on unmodified phones (e.g., 98.9 Mbps in tests); aligns with mandatory high-performance specs that early Starlink D2C (more SMS/OTT-focused initially) may not fully meet yet.
Domestic control & autonomy: AST operates as a bent-pipe, unlike Starlink who routes and processes data across inter satellite links, the bent-pipe better preserves data sovereignty concerns.
Tailored engineering: Orbital adjustments (e.g., Block 2 inclination for Japan coverage), timeline alignment with 2029 deadline, and exclusive Japan focus in early service focus areas.
Disaster & coverage edge: Strong emphasis on unmodified phone broadband in remote/disaster zones; AST doesn't require any specific phone hardware for broadband, Starlink will.
Reliable Japanese media and analyst reports (citing the program structure) consistently say the winner is expected to be selected/announced around the end of June 2026 - but there doesn't appear to be a hard deadline written verbatim in the official guidelines. Hopefully we hear something in the next two weeks!