At high noon on the 12th of November 1974, eleven year old twin brothers, Yoshitsugu and Katsuji Iino, were looking at the sky from a back window of thier home in Obihiro city when they noticed a mysterious dark disc-like flying object hovering in the sky. One of them went for a camera while the other kept his eye on the object, and they succeeded in snapping four photographs (only one shown here) in quick succession before the object went into the clouds and disappeared from view.