Tsubame Industries, a Tokyo-based startup, just unveiled its massive human-piloted robot. The four-wheeled robot named ARCHAX, which bears some resemblance to “Mobile Suit Gundam” from the popular Japanese animation series, is about 15-feet tall and weighs 3.5 tons. Tsubame CEO Ryo Yoshida plans to sell five units of the robot for nearly $3 million each.