This book is the second in a series on Japanese prototypes and secret projects. It covers many different aircraft from pre-war types to right up till the end of World War II. In all 38 types are covered in this volume with an additional section covering the nuclear weapons programs of the IJA and IJN.
The book begins with two Aichi designs. The B8A Mokusei (a slightly smaller B7A “Grace” with straight non-folding wings) and the S1A1 Denko are discussed. The Denko was a lovely design for a twin engine night fighter. Ordered into production, it would never take to the air as both prototypes and the Aichi factories were destroyed in raids by B-29s.