Toyota is recycling old EV batteries to help power Mazda's production line

had to check: toyota owns 5% of mazda which makes them the largest shareholder.

Toyota also owns Daihatsu, which is a lesser known name in the US, but is a major maker of kei cars, which are huge in Japan and other parts of Asia.

They also own Denso, which is the second largest auto parts company.

And they partner with Subaru on some things, such as the Subaru BRZ and Toyota GR86, which are basically the same car with different badging.