Teyvat has a variety of hidden objectives players can discover. One of these is located on Watsumi Island. You’ll find them in the Sangonomiya Shrine area. Strange Pirate SymbolsThat they resemble an Oni.
Unlock their secrets to score yourself a whole bunch of Chests—including an elusive Precious Chest.
Head southwest towards Bourou Village on the map above. You’ll find a cave that has a table and a glowing object on top.
Interact with the glowing object—the Treasure Hoarder’s Notes—which describes a person named Rinzou who allegedly hid treasures across the island and marked their positions with symbols. This will lead to the hidden goal: Find those symbols and hoard treasures!
These are the total number of Eight Pirate SymbolsThere are many of them scattered around Watatsumi Island. The image below shows their locations. Once you have located them, you will want to search for them. Dig interaction nearby. It will trigger a Common Chest to emerge.
Treasure Hoarders are able to beat you to some locations, so not all Pirate symbols will contain a chest. These symbols will still trigger dialogue interactions with Paimon so be sure to visit all eight locations.
After interacting with all eight Pirate Symbols, head to the area northeast of Sangonomiya Shrine and southwest of Suigetsu Pool—in the area marked with a circle above.
There you will encounter the Treasure Hoarders, who guard a locked chest. You can defeat them and unlock the Exquisite Chest. To obtain a secret quest item, you must interact with the player: Rinzou’s Letter. This letter describes Rinzou’s experiences as a legendary pirate and his retirement from treasure-hoarding.
Once you have received the Letter, return to the Cave southwest of Bourou VillageThe original Treasure Hoarder’s Notes were found in the following: A new Dig interactionIt will appear before the table. You can interact with it to trigger a Precious ChestTo Appear.
This hidden objective unlocks the Achievement The Treasure of a Distant Sea Sheperd.
This is your chance to discover more about Watatsumi Island. Check out our guide How to farm Sango Pearl in Genshin Impact.