Tamaki Matsumoto

Cousins Amane and Natsuki are whisked away on a wonderous adventure featuring humorous alien creatures, jellyfish spaceships, and dragon trains.

Koichi Uehara, a fourth-grader living in the suburbs of Tokyo, picks up a fossil that looks like a large stone. To his surprise, he has picked up a baby Kappa (a Japanese mythical water creature), who has been asleep underground for the past 300 years.