Skins from The Rising Sun Collection are not obtainable through the weekly drop.
The Rising Sun Collection is a Valve-made collection of CS:GO skins introduced on 26 May 2015. The collection consists of 5 consumer skins, 2 industrial skins, 3 mil-spec skins, 4 restricted skins, 1 classified skins, and 1 covert skins.
The Rising Sun Collection was available as a weekly drop to players who held an operation pass for CS:GO operations Bloodhound in 2015, Wildfire in 2016 and made its final appearance in 2017 for Operation Hydra.
The Rising Sun collection CS:GO skins draw some inspiration from Japanese culture. Some notable examples of this include the anime artwork on the AUG and the variety of kimono patterns used on some of the pistols and the G3SG1.