In the DMZ map "Ashika Island," there is a "Drifting Supply Bag Key" that contains $30k worth of guaranteed loot in the form of 3 masks. 6x masks (including at least 1x original) are also required for the "CONTRABAND STASH EXPANSION 3" upgrade mission (found under "Missions ➡ Upgrades ➡ Weapons Locker"), making this locked treasure very valuable for both loot and missions.

The "Drifting Supply Bag" requires a key to unlock it, so if you haven't yet completed this contraband mission, save (stash) this key for later use! Otherwise, it's a good chunk of change towards a rekit or a wallet fund.

As of Season 04, the Drifting Supply Bag contains:

* Ichika's Journey 3 (a journal)
* Ashika Tengu Original (mask, $10k)
* Ashika Kitsune Original (mask, $10k)
* Ashika Mask of Riddles Original (mask, $10k)

These items cannot be stashed, and will be removed from your inventory when you exfiltrate the DMZ (converting their cash value directly into experience points).

The bag is on the ocean floor in the northeastern quadrant of the map, and it's not visible from the surface unless you're directly over top of it. This makes it tricky, and timeconsuming, to locate the treasure; but there's an easy way to do it, and find it every time on the first try: Triangulation.

Using the prominent landmarks of the northernmost radio tower as one landmark, and the peak of the Ashika Castle as the other, you can use triangulation to go straight to the hidden treasure easily: 215 degrees to the radio tower, and 144 degrees to the peak of the castle and you're there.