Its always a good idea to pass the guns on to a relative who is knowledgeable about them. Hopefully he or she won't bubba the guns up and ruin them as the supply of original military guns is limited, even the lowly Arisaka.
There is lots of info on you tube like Forgotten Weapons.
I just inhereted ny cousins WW2 T38 and will keep it original. My daughter has my previously sporterized Type 99 (not by me) and learned iron sight installation and muzzle threading for recoil reducer installation, etc.
I hope you can appreciate what you have and pass them on. Have fun with them! Mel