First talk to the Emperor Natogawa and ask him about the war between Chinyang and Oshurakan, he will say that he wants peace but Oshurakan refuses to sign a peace treaty. Ask if you can help, then he will send you to find the ninja general Kishiro Mototora. Go to Koroshima and find a building that have the dojo symbol and enter, if you previously enter the building you will find only a bronze arrow respawn point, but when you enter after talking to the emperor you will find the general Mototora in gold-trimmed samurai armour, talk him and he will say that he knows why you are there, then he will reveal that the entrance ninja guardian of Koroshima that appeared in Emperors' City was him. After that 6 ninjas will appear behind you and will halt, then he will give you a list of items that yo