AST SpaceMobile (ASTS) Secures Up To $1 Billion For Japan Satellite Venture

• AST SpaceMobile (NasdaqGS:ASTS) and Rakuten agreed to form a joint venture to build a direct to device satellite network in Japan.

• The venture plans a dedicated mid band satellite constellation aimed at serving commercial smartphones and emergency connectivity nationwide.

• The project is supported by up to $1b in funding from the Japanese government, according to the announcement.

• This Japan sovereign direct to device venture with Rakuten sits alongside wider themes that recent research on AST SpaceMobile has uncovered. Our analysis turns up 2 warning signs for AST SpaceMobile as well.

This move into Japan is one example of how satellite players are tying into broader connectivity and data themes that also benefit 53 AI infrastructure stocks .

AST SpaceMobile focuses on building its BlueBird satellite constellation, positioning the telecom player as a potential wholesale backbone for mobile operators that want space based coverage without running their own satellite fleets. In Japan, that puts the company directly in the mix alongside established terrestrial networks that are trying to extend reach to standard smartphones.

2 things going right for AST SpaceMobile that this headline doesn't cover.

How the Rakuten deal tilts the AST SpaceMobile Narrative

The investment story for AST SpaceMobile is that carrier partnerships and spectrum access can turn its BlueBird constellation into a global, phone-compatible network that earns returns on heavy satellite spending. A sovereign joint venture in Japan plugs directly into that Narrative because it tests whether mobile operator alliances really convert into durable usage and funding support.

"Definitive commercial agreements with major mobile network operators such as Verizon, AT&T, Vodafone and stc, together with more than 50 partner MOUs covering nearly 3 billion subscribers, provide a multi year visibility path for service activation..."

See how the full story points towards a $74.28 fair value for AST SpaceMobile .

On the bull side, the Rakuten AST venture and up to US$1b of J LEO support line up cleanly with the thesis that operator-led deals and government programs can underwrite AST SpaceMobile's capital-heavy rollout. It also nudges the Narrative toward more diversified demand, since Japan's emergency-coverage focus differs from AT&T's rural fill-in or potential rivals like SpaceX targeting direct retail access.

The bear case does not disappear. AST SpaceMobile still reported a Q3 2026 net loss of US$132.38 million and US$554.3 million over nine months, while also committing roughly US$800 million to its Blacklift launch plan, so execution and funding discipline stay front and center even with government-backed projects. The Japan constellation adds another layer of complexity and delivery risk on top of existing launch, manufacturing and spectrum milestones.