Aika was born on November 26, 1979 and passed away on December 27, 1991.
For a girl so young, Aika knew more about the environment than other children. She left a lasting legacy with the publication in several languages of her book Secrets of the Earth. The book tackles many of the problems pertaining to man and nature.
Presented as a comic book Secrets was a one-girl project. Aika drew the illustrations, composed the text, organized the layout and the overall presentation. The book is being used as a textbook in elementary and secondary schools in Japan and its relevance may prove useful in other countries as well.