Players looking to complete all high and low crafting research on the vast Tsushima Island, and there is one place that spawns an endless supply of bears. There are two bears per spawn, and they'll respawn whenever you quickly get there. These are two predator skins that you can grab in a matter of minutes, then reset and start the cycle again. Once you've earned enough Predator Skins, you can just start selling the extras you don't need for a little extra cash after the game.
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To find an endless supply of predator skins, locate a camp called Rushed water crossing in Izuhara, east of Cloud Pass. When traveling quickly to this camp, a scripted event occurs when the camp is attacked by two bears. This event happens whenever you quickly travel through the area, so you can just leave and then quickly come back to reset the bears.
The camp has a chest with steel and you can find Scattered Iron - both will also respawn when you quickly make your way to the area. Go to the area, kill the bears, collect the loot, and leave quickly. You can also just die after catching the bears to farm a bit faster.
Bears are dangerous. If you're having trouble with bears, you'll want to equip yourself with kunai, use sticky bombs, or just shoot bears with arrows to kill them quickly. If you are an experienced sword fighter, you will have no problem taking down all the bears in your path. This area is useful pretty much any time in the game, even after the game, when you need extra supplies to buy whatever you need.