Simplify the following text for a Grade 8 native English-speaking person.
Original: Jien records that KÅ an was the second son of Emperor KÅ shÅ , and that he ruled from the palace of Akitsushima-no-miya at Muro in what will come to be known as Yamato province .
Simplified: The GukanshÅ ruled from the palace of Akitsushima-no-miya at Muro in what will come to be known as Yamato province .