If you need a resource on the incremental changes to the major Japanese rifles over the course of WWII, Japanese Rifles of World War II is just the thing for you. Focusing on the Type 99, Type 38, Type 44, Type 2 (paratrooper) and sniper Arisakas, this book is ideal for beginning and intermediate collectors. Everything you need to identify date and location of manufacturer of 98% of the Japanese rifles you will find out there. This is also enough information to point out the holes in your Arisaka collection, so be careful! :)

https://www.amazon.com/gp/product/1880677113/ref=as_li_qf_sp_asin_tl?ie=UTF8&tag=forgoweapo-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=1880677113