The event at a local elementary school was billed as a chance to showcase some of the technology Japan hopes will wow visitors at the Tokyo 2020 Games.
Some 600 pupils clapped and shouted “kawaii (cute)!” as the toddler-sized versions of the Tokyo 2020 Olympic and Paralympic mascots were unveiled.
The futuristic-looking pair, Miraitowa and Someity, can show “feelings” in their gleaming eyes by displaying hearts or stars.
School principal Jun Ninomiya told children the “robots will play active roles behind the scenes” at the summer games.
“Have fun and find out what functions they have and what they can do,” he told the children at Hoyonomori Elementary School in Tokyo.
Blue-and-white Miraitowa is the mascot for the Olympics and pink-and-white Someity is for the Paralympics.
With huge eyes and pointy ears, the mascot robots have multiple joints and arms which can be remotely controlled.