Echoes of the past

You are a samurai living in Japan in the year 1570. One day, when you went into battle one day, you died, but when you opened your eyes, you found yourself in a place you did not understand. It is Tokyo, Japan, the year 2020. You are standing in the middle of the city in your red samurai armor and with two swords on your belt. Will you try to figure it out or just enjoy life? What you will do now is up to you.