Nippon Telegraph and Telephone (NTT) plans to test driverless vehicle technology with Toyota and invest in a U.S. startup developing self-driving systems, a spokesperson for the telecommunications firm said on Monday.

NTT aims to start tests with autonomous buses and taxis as early as 2025 and invest about ¥10 billion ($66.91 million) in U.S. startup May Mobility, the spokesperson said, highlighting growing momentum behind self-driving technology in Japan.

The Nikkei newspaper first reported on Monday that NTT will invest in May Mobility, adding that both NTT and Toyota would jointly develop vehicles. Both the NTT spokesperson and a Toyota spokesperson said they had no plans for joint development. Toyota did not comment further.

May Mobility has attracted investments from Japanese firms before. Insurer Tokio Marine said last year it had joined a $111 million funding round in the Michigan-based firm, while a Toyota-linked venture capital unit coled a seed investment in the company in 2018.

NTT's growing involvement in autonomous driving technology comes after Honda said in October it aimed to set up a joint venture with General Motors and its robo-taxi firm Cruise and wanted to begin a driverless ride service in Japan in early 2026.

Cruise late that month suspended all driverless vehicle operations in the United States following an accident that led California regulators to order the company to remove its driverless cars from state roads.