J4

J4 (Midnight Express) is the youngest of the three members in the bullet train team. He is cheerful, friendly and eternally upbeat in the company of his friends, but harsh in the presence of enemies. J4 transforms to an E4 Series Shinkansen bullet train engine. He is equipped with high temperature missiles, and his shoulders can generate shearing blades of solid light, capable of slicing giant icebergs in two. He has high strength and endurance in cold weather, but is less efficient in warmer environments. He transforms into the legs of JRX (Rail Racer).

(Source: Wikipedia)