Let's Go Play at the Mangaka's House, Part 1 (漫画家のうちへ遊びに行こう その① Mangaka no Uchi e Asobi ni Ikou Sono 1), originally Visiting the Popular Mangaka's Home! (人気漫画家お宅訪問！ Ninki Mangaka Otaku Hōmon!) in the WSJ release, is the fifty-third chapter of Diamond is Unbreakable and the three hundred eighteenth chapter of the JoJo's Bizarre Adventure manga.
Toshikazu and Koichi discover that the famous mangaka known as Rohan Kishibe is currently living in Morioh, and go to his house for an autograph. Rohan invites them to come in and tells them that the secret to writing 'interesting comics' is for them to be realistic. Koichi and Toshikazu then find out that Rohan is way weirder than they originally thought.