post #1655611

The tailed beasts (尾獣, bijū), sometimes referred to as "Chakra Monsters" (チャクラのバケモノ, Chakura no Bakemono), are the nine titanic living forms of chakra created by the Sage of Six Paths out of the chakra from the Ten-Tails. They are differentiated by the number of tails they have, ranging from one to nine.

Since they all are considered siblings in the manga, two or more tailed beasts having sex with each other counts as incest.

https://naruto.fandom.com/wiki/Tailed_Beast

List of tailed beasts:

• Shukaku (1 tail)
• Matatabi (Naruto) (2 tails)
• Isobu (3 tails)
• Son Goku (Naruto) (4 tails)
• Kokuo (5 tails)
• Saiken (6 tails)
• Chomei (7 tails)
• Gyuki (Naruto) (8 tails)
• Kurama (9 tails)