Senpuujin (旋風神, "Whirlwind God") is the first and central combining robo of Ninpu Sentai Hurricaneger (2002) and the cornerstone of the show's mecha arsenal. It is formed from the three "Karakuri Giants" piloted by the Hurricanegers of the Hayate Way Ninja Academy: Hurricane Hawk (HurricaneRed), Hurricane Dolphin (HurricaneBlue) and Hurricane Leon (HurricaneYellow). On the call "Ninpu Gattai!", the hawk, dolphin and lion snap together into a classic ninja warrior — the Hawk forming the chest and head, with Dolphin and Leon making up the limbs.

Its signature feature is the Karakuri Ball system: fist-sized spheres that pop open into tools, weapons or add-on modules and stow away inside the chest — a genuinely distinctive play gimmick for its era. Senpuujin's standard weapon is the Sword Slasher, a ninja-styled katana, and HurricaneLeon's head can be set spinning. Via the Karakuri Balls it can also shift into special configurations such as the Senpuujin Sword Slasher.

As is typical for Hurricaneger, Senpuujin is only the starting point of a modular mecha family. Combined with the Gouraiger robo Gouraijin and the Karakuri dragon Furaimaru it forms the towering Gourai-Senpuujin (finisher: Rolling Thunder Hurricane); adding Shurikenger's Tenkuujin as a right arm yields the ultimate union, Tenkuu Gourai-Senpuujin. That building-block logic keeps Senpuujin one of the most sought-after collector mechas of the early 2000s.

The DX toy launched in 2002 from Bandai Japan as a premium die-cast/Chogokin robo with real metal heft, heavy chrome and gold plating, and a ripcord that spins the lion head; the box included Hurricane Hawk, Dolphin and Leon, the Sword Slasher and a Karakuri Ball set. With the separately sold DX Gouraijin and Karakuri Ball Set #3, collectors could build the Gourai-Senpuujin. In the U.S., Bandai America released the mold as the Storm Megazord (Storm Power Megazord) for Power Rangers Ninja Storm — comprising the Hawkzord (Shane/Red), Lion Zord (Dustin/Yellow) and Dolphin Zord (Tori/Blue). The American version was notably cheaper but cut back the die-cast (the hawk tail and various leg joints became plastic) and the chrome finish, while keeping the beloved ripcord lion head and the Karakuri Balls, rebranded as Ninja/Power Spheres.