Japanese slings and straps ID help please

[Johndanger]

I picked up this grouping brought home by an American 1st Cav veteran.

group

I am trying to ID a very long leather strap or sling it's 2 pieces of leather joined in the middle and has a painted steel buckle and 78 inches long, and is basically just like a very long belt in construction

Straps

there is a matching strap but it is only half of it, the buckle end

2 piece connection stitching

the only thing I have seen that looks similar is the strap to a medic's bag , but it had a different type buckle

the other items I believe are a rubberized Arisaka sling, a rubberized nambu belt , a sword knot and a candle lantern

[Jareth]

The rubberized strap with flap behind buckle is a waist belt for type 14 holster as you already know. Other leather belts MIGHT be similar but they lack leather flap behind buckle. Certain the other rubberized isn't for rifle as buckle is different. Get us the length of the other straps. Check for ink stamps too!