Chang's Shell Chinese folklore children's book story fantasy China old tale cult

Chang's shell Paperback 1970 Printed in USA Illustrations by Kyuzo Tsugami Level 8 reader 9x7" 46 pages Cross-posted Sale choose 5 $10 items for $25 I don't know if this is Chinese or Japanese honestly. Chang is a common Mandarin name meaning to last forever. But the illustrator has Japanese first and last name 53