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Toyota backs Tier IV in level 4 autonomous vehicle push

The stake, made through Toyota subsidiary Toyota Invention Partners, amounts to a 1% holding valued at an estimated Y1bn ($6.2m).

Toyota Motor has acquired a minority stake in Japanese autonomous driving startup Tier IV, pairing the investment with a memorandum of understanding on technology collaboration.

The acquisition, made through Toyota subsidiary Toyota Invention Partners, amounts to a 1% holding valued at an estimated Y1bn ($6.2m).

Tier IV, established in 2015, builds autonomous driving systems on Autoware, an open-source software platform developed alongside Nagoya University and the National Institute of Advanced Industrial Science and Technology.

According to the Nikkei Asia’s report, its existing investor base includes Sony Group, Sompo Holdings, KDDI, Suzuki Motor and Isuzu Motors.

Under the terms of the partnership, Toyota intends to integrate Tier IV's technology into its e-Palette electric vehicle to achieve Level 4 autonomous driving capability by fiscal 2027.

Launched in 2025, the e-Palette functions as a shuttle bus and is designed to operate without human input under defined conditions at that autonomy level.

The alliance fits within Toyota's wider autonomous vehicle strategy, which blends internal research with geographically targeted partnerships.

In Japan, the company is concentrating on self-driving applications in buses and similar vehicles, while in the US and China it is engaging with local robotaxi developers.

Existing collaborations include a partnership with Pony AI in China, established in 2019, and a preliminary agreement with Waymo – an Alphabet subsidiary – signed in 2025 to develop autonomous ride-hailing services.

According to the report, the approach reflects Toyota's broader "multi-pathway" philosophy, whereby technologies and alliances are tailored to the conditions of individual markets.

Tier IV is separately working with Isuzu and Suzuki on autonomous driving systems for buses and minicars, the report added.

The investment coincides with a Japanese government target to roll out Level 4 autonomous services across 100 locations by fiscal 2027, a push partly driven by the country's growing labour shortages.