Pink Tentacle posts 28 Tetsujin manga covers from 1956 to 1966. Tetsujin is a famous Japanese robot manga series written and illustrated by Mitsuteru Yokoyama. It follows the adventures of a 10-year-old boy and Tetsujin, his giant crime-fighting robot. The manga was later adapted into four anime TV series. It was the first Japanese series to feature a giant robot.