The early episodes of the 2011 Hunter x Hunter anime adaptation feature an intro that includes a golden mask with a red gem and vampire-like fangs. This mask strongly resembles the Stone Mask with the Red Stone of Aja.
In chapter 378, the character Luini references the quote from Dio Brando's follower in Phantom Blood, , while spying on the characters Nobunaga, Phinks, and Feitan.
In chapter 382, the character Halkenberg is depicted shooting himself and having his Nen Beast catch the bullet, very similar to how Jotaro Kujo has his Stand Star Platinum catch a bullet he shoots to his head in his introduction.
In chapter 387, the character Tserriednich explains his Nen ability, which is very similar to Diavolo's Stand King Crimson and its Epitaph ability. Both abilities allow the user to see 10 seconds into the future and change their actions according to it while everyone else is unable to perceive their changed actions.
In chapter 389, a character is depicted reading the "Book of Tyson", which is said to use music lyrics to convey messages, very similar to how Araki tends to use music references for his names and story. The final chapter of this book is called "What a Wonderful World", which is the name of the final chapter of Stone Ocean.
In chapter 390, the character Hinrigh is shown using his ability, which can turn any device or object he touches into a living creature. The device or weapon can retain its original function and can be manipulated at will. This ability is very similar to
Giorno Giovanna's Stand
Gold Experience.