Finely Got it Arisaka Type 99 carbine

[jangle]

Your ladder is a Kokura made sight.
Probably what has happened back through its life, all the "bells & whistles" were removed (mono-pod, cleaning rod, AA wings etc) and someone then found a pair of loose wings to install on the rifle, not knowing the manufacturing differences.

As far as books go, "Military Rifles of Japan" by Fred Honeycutt, 5th edition, first published in the 1970's is still a top notch reference. You can buy it directly from Fred if you frequent the Rising Sun Board on GunBoards.
"The Japanese Type 99 Arisaka Rifle" by Don Voigt is out of print, but sometimes can find a copy on auction sites.
"The Type 38 Arisaka", revised edition, by Francis Allan & Harold Macy, again purchased from Author on GunBoards.

These will cover 99% of anything that you might have an interest in. There are other books that specialize in snipers, early Japanese firearms etc.