Flower–Fruit Mountain

While in his transformed state, Rōshi creates a pool of lava, which erupts like a volcano. As the lava flies up in all directions, it resembles that of a giant flower. The lava is hot enough to burn tailed beasts, as demonstrated against Gyūki.

Trivia

 * The summit of the is the birthplace of Sūn Wùkōng, the main character of the Chinese novel Journey to the West. The mountain is located on a volcanic island. The Four-Tails, of course, is based on Sūn Wùkōng and the Dragon Ball series, which in turn is also based on Journey to the West.
 * When written as 火山, kazan means 'volcano'.
 * In an anime exclusive sequence, Rōshi, while offscreen, used what appears to be this technique when colliding with Kisame's Water Release: Great Exploding Water Colliding Wave technique.