The remaining two EVs will be detailed next year, Toyota has hinted.
The Sport Crossover doesn't directly replace any current model but rather arrives as an all-new proposition and takes the brand into the premium-oriented D-segment, rivalling the likes of the Volkswagen ID 7 and Hyundai Ioniq 6.
Toyota product development boss Andrea Carlucci described it as the "perfect style hero" of the six-strong EV line-up, highlighting that it's longer, wider and lower than the bZ4X but makes minimal concessions in terms of practicality and comfort.
He revealed that the concept measures 4.9m long at the kerb but that precise dimensions will change for the production version.
"I would say it looks at a different customer," he said. "We believe that the market isn't just SUVs. Of course, it is the latest trend and one that will stay a while, but we want to offer solutions for any kind of customer. This could be the solution for the customer that's specifically looking for something which is stylish.
"We want to deliver something which is closer to the new cues of Toyota - being a bit obsessed with sportiness, especially at the back with the coupé or fastback design."
The Sport Crossover has been developed in tandem with Toyota's Chinese-market joint venture partner BYD, which is also likely to supply its batteries, as it does for the bZ3 saloon in China, but Toyota wouldn't confirm if European cars will be made in China.