Blue Earth

(from ebookjapan):
Yuzuru Kazamatsuri, one of Japan's leading zoologists, received a request from the International Union for Conservation of Animals and Nature, of which he is a member, to conduct an investigation. Accompanied by his elementary school son, Ken, he headed first for Singapore. There, Yuzuru told Ken about the two purposes of this research trip. One was to check the conservation status of rare wildlife around the world. The other was to confirm the existence of an unidentified "animal" that had been reported from all over the world. The animal is called the "Blue Beast," and it appears and disappears from the wild. ......?