Those are volumes of the Imperial Japanese Naval Ship plan. The set has five volumes.
You have the first and last volume. The volume you have included some CV, CA, CL, DD, and sub plans. If you are interested in the English names of those ships, let me know.
It was listed online for 23,100 yen($213)in Japan for the complete set.
No idea how much for individual volume. I may be interested if you want to sell.
You can contact me at USSvf17@yahoo.com