Castle Shimura is the seat of Clan Shimura in Toyotama and the biggest battle of Act 2. Khotun Khan holds it after the invasion, and you retake it in The Fate of Tsushima alongside every ally you have gathered.
A battering ram breaks the first gates while you clear waves of Mongols. Lord Shimura sends you ahead to scout, then to destroy a Hwacha with Yuna's help. A cart of explosive barrels wrecks the bridge to the main keep and stops the frontal assault.
Jin uses the grapple hook to slip under the broken bridge at night. He poisons the Mongols' fermented milk with wolfsbane and enters the keep. Inside he finds Ryuzo instead of the Khan, and the two duel a final time.
Jin is arrested for using poison and later escapes with Kenji's help, though his horse is hit by arrows as he flees. In Heart of the Jito he sneaks back in without killing any samurai to leave his uncle a message about the Khan's base.
The Fate of TsushimaThe Fate of Tsushima is the Act 2 tale that starts the assault on Castle Shimura alongside the shogun's reinforcements under Lord Oga. It is a long tale and a partial point of no return, so wrap up side work before you confirm.
From the DarknessFrom the Darkness is the last tale of Act 2, where Jin goes against his uncle's orders and sneaks into Castle Shimura to poison the Mongols. It gives you the Ghost Armor and ends with the story moving north to Kamiagata.
Honor and AshHonor and Ash is the opening tale of Act 3, where Jin escapes Castle Shimura unarmed and rides into the snowy north of Kamiagata to find Yuna. It ends with a hostage rescue at Jogaku Temple, which becomes your new base.
Heart of the JitoHeart of the Jito is the Act 3 tale where Jin slips into Castle Shimura unseen to leave his uncle a letter asking him to join the final battle. It is a strict no-detection tale, and you also choose a new horse.
Lord ShimuraLord Shimura is the jito of Tsushima, the shogun's appointed ruler of the island, and Jin's uncle. He raised Jin as a samurai after Jin's father died. He leads the defence at Komoda Beach and is the man you spend Act 1 trying to rescue. He also has his own Tale of Lord Shimura in the main story.
Image: Sucker Punch Productions / PlayStationKamiagata
Kamiagata is the snowy northern region of Tsushima and the setting for Act 3. It is thinly settled and harsh, and it is where you chase Khotun Khan to his final stronghold at Port Izumi.
Image: Sucker Punch Productions / PlayStationJogaku Temple
Jogaku Temple is a monk pagoda in Jogaku, the northernmost temple on Tsushima. You free it from the Mongols and use it as a base for the attack on Port Izumi.
Lord Shimura's Camp
Lord Shimura's Camp is the samurai war camp in Kubara where your uncle gathers his army to retake Castle Shimura. You meet your allies here before A Reckoning in Blood and The Fate of Tsushima.
Image: Sucker Punch Productions / PlayStationKin Sanctuary
Kin Sanctuary is a town in Kin Prefecture that Jin reaches after escaping Castle Shimura in Honor and Ash. He finds it burned by the Mongols, and what happened to its people is a key story turn.