SoftBank, Sceye verify direct-to-device stratospheric connectivity in Japan trial

• SoftBank partnered with U.S.-based Sceye to test high-altitude platform systems for mobile broadband and edge computing from the stratosphere.
• Work in Japan verified direct-to-device connectivity to unmodified phones through SoftBank’s core network, using Sceye’s “cell tower in the sky” payload.
• Demonstration included onboard processing on the platform, cutting latency by over 40% versus cloud processing, with a 68 ms average round trip.
• Tests formed part of Sceye’s ST1 mission, a 30-day, nearly 30,000 km roundtrip flight between New Mexico and Japan.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. SoftBank Corp. published the original content used to generate this news brief via PR Newswire (Ref. ID: EN43345) on September 09, 2026, and is solely responsible for the information contained therein.