Rakuten Group said Monday it will establish a joint venture this month with U.S. satellite manufacturer AST SpaceMobile, targeting a domestically operated broadband-from-space network in Japan by the end of March 2029. The announcement places Japan's e-commerce and mobile champion squarely in the race against Starlink, whose low-Earth orbit service already counts Japanese enterprise and government users among its customers.

Kyodo News reported the partnership from Tokyo, quoting Rakuten executives who described the venture as autonomously operated and managed inside Japan. That framing matters for disaster communications: after the 2011 Tohoku earthquake, policymakers repeatedly pressed for redundant links when terrestrial towers fail. A locally governed satellite layer would give ministries a domestic contractual counterparty if fibre and microwave routes go dark.

What AST brings

AST SpaceMobile has been testing large-aperture satellites designed to connect directly to unmodified smartphones, a different architecture from traditional bent-pipe satellites. Rakuten's decision to partner rather than build alone suggests the Japanese group wants production know-how and orbital intellectual property now, rather than funding a standalone constellation program. Financial terms were not disclosed in the Kyodo summary.

Competition policy watchers will ask how the venture interacts with Rakuten Mobile, the group's loss-making national carrier. Wholesale satellite backhaul could lower rural deployment costs for 4G and 5G sites, or it could bypass terrestrial build-out entirely in mountain communities where fiber economics fail. Either way, the Ministry of Internal Affairs and Communications will scrutinise spectrum coordination and any cross-subsidy between the mobile unit and the satellite affiliate.

SpaceX's Starlink already markets enterprise kits in Japan and has struck agreements with regional governments for disaster drills. Rakuten's pitch—that Japan should not rely solely on a U.S. operator for space-based continuity—echoes European debates about sovereign capacity. AST's manufacturing base in Midland, Texas, nonetheless keeps critical hardware overseas, so "autonomous operation" in Rakuten's wording likely refers to network control and customer contracts rather than entirely domestic satellite fabrication.

Timeline risks

A March 2029 service deadline is aggressive by aerospace standards. Regulatory filings, launch manifests and ground gateway construction must align across three years, and AST must scale production beyond its prototype satellites. Rakuten investors have seen the mobile division burn cash for years; they will want capital intensity estimates on the joint venture before the group reports December earnings.

Japanese corporations have partnered with U.S. space firms before—think weather payloads and missile-tracking experiments—but consumer-facing broadband is a larger commercial bet. If launches slip, Rakuten would still face Starlink bundles marketed to rural municipalities and shipping fleets.

What happens next

Expect incorporation documents and board appointments within weeks, followed by ministry briefings on spectrum and foreign-investment review if AST's stake triggers thresholds. Equipment vendors serving Rakuten Mobile will watch whether satellite backhaul appears in next fiscal year's base-station tenders.

The venture does not close Japan's connectivity gaps overnight. It does, however, signal that one of the country's most visible digital conglomerates believes satellite direct-to-device economics are close enough to schedule—and to challenge the incumbent U.S. service on Tokyo's own terms.