A Japanese feature film wants people with the same three elements to summon a robot.

I think you may be talking about the first "Gransaisa" in the series of special photos of Superstar God. You can see the introduction by searching for "superstar god" in Baidu Encyclopedia.

A * * * is twelve soldiers corresponding to twelve constellations, which are divided into fire system, water system, soil system and wind system. There are three soldiers in each department, and each can summon a robot.