Chapter 319

Let's Go to the Manga Artist's House, Part 2 (漫画家のうちへ遊びに行こう その②), originally The Best Source Material! (最高のネタ！) in the WSJ release, is the fifty-fourth chapter of Diamond is Unbreakable and the three hundred nineteenth chapter of the JoJo's Bizarre Adventure manga.

Summary
When Rohan leaves his workplace, Hazamada and Koichi decide to take a peek at the newest chapter that Rohan has just finished drawing. After they witness the greatness of Rohan's manuscripts, the manga artist enters the room and uses the ability of his Stand, Heaven's Door, to open Koichi's face like a book and look at his story. After he discovers that Koichi also has a Stand and learns of his adventures with Josuke and Okuyasu, he says that he has finally found the perfect inspiration for his comics.

Trivia

 * When Koichi and Hazamada look at Rohan's Pink Dark Boy manuscripts, the pages are reused from Chapter 276 and Chapter 277, showing panels of Josuke and Okuyasu.