Rieko Nakagawa is a Japanese children's literature writer and lyricist. Her first work, Iyayaen, was published in 1962, and she has published over 30 books since then. She has won multiple awards for her works, including the Kikuchi Kan Prize.
Doraemon, Nobita, and friends discover an underground world overrun by giant monsters, including the King of the Monsters himself Godzilla and his son Minya. Only to be confront an enemy which threatens to take over the Hollow Earth and wipe out the monsters from the face of the earth forever.
