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Exploding Sphere
Kunai Sphere
Kanji 爆砕玉
Rōmaji Bakusaidama
Literal English Exploding Sphere
English anime Summoning: Mechanical Bomb
Manga Chapter #256
Anime Naruto Shippūden Episode #13
Game Naruto Shippūden: Ultimate Ninja 4
Appears in Anime, Manga, Game, Movie
Related tools
Explosive Tag, Kunai

A ninja tool stored in Tenten's large scroll. It's a metal sphere with kunai welded into it, which also has a hidden explosive tag that causes it to explode upon contact, sending out kunai and fragments of the sphere thrown out by the explosion as shrapnel.