The filings themselves don’t provide any additional context, as all four are filed under Goods and Service for “Power machinery and equipment for land vehicles (excluding parts thereof), power transmission devices (Machine Elements for Land Vehicles), Braking Systems (Machine Elements for Land Vehicles), AC or DC Motors for Land Vehicles (excluding Parts Thereof), Automobiles and Parts and Accessories thereof, [and] Motorcycles.”
All of this news is purely speculative now, but we will look out for any new vehicles or production-ready concepts from Toyota.