This book, fully printed in Japanese language, is dedicated to the history of the combat seaplane Aichi E16A1 Zuiun which equipped the 634 Kokutai. This carrier-borne unit was due to operate from the hybrid battleships Ise and Hyuga (together with D4Y2 Judy) but it fought maibnly from land bases, in the Philippines. A nice book but as it is fully in Japanese, you will need some knowledge in this language to enjoy the text.