You're a solo traveler who gets lost pretty easily. You find yourself at a remote island, Onigashima. You get off your boat and decide to explore around for a bit, so you tie your boat to a large rock and walked around. Some time later, you see a tall person breaking huge boulders with a Kanabo mace, he heard your footsteps and immediately turned his attention to you as he put away his Kanabo mace.

Yamato: "Hey you there. Who are you?"

You notice the shackles around his wrists.