Ultra Q S01 E15 Kanegon's Cocoon

"The classic series that launched the Ultraman franchise!"

One day at a construction site, a group of children were finding valuables in the dirt when a man on a bulldozer ran over their bikes. When the children went to recover them, one of them named Kaneo Kaneda (in Japanese, kane means money) found a small object that had a jingle sound much like money in it.