The book is very complete, listing almost EVERY warship, of every size and type, manned by the IJN during the covered period. The data are quite detailed and the book is filled with a lot of fine drawings. The photos are not so numerous but all of them are of good quality. Every class is briefly described in all respects: technically, historically and as regard the operational career of each ship till her life's end (scrapped or lost, it doesn't matter). If you are looking for a complete reference on the IJN's warships, you can't miss this book: I own a good warship library, comprising other books dealing with the IJN, but I regard this one my true reference on the matter!