The Karakuri Balls are the signature gimmick line of Ninpu Sentai Hurricaneger: compact capsule spheres that pop open and become the very tools and weapons the Shinobi Machines wield in battle. Each ball carries a kanji character taken from the Shinobi Medals. The Plant Axe is Karakuri Ball No. 04 and bears the character 車 (wheel) — fitting, since its design is modeled on a pinwheel, its spinning blades giving it that distinctive whirling look.

Within the show, the Plant Axe is the primary armament of Gouraijin, the combined mecha of the two Gouraiger brothers (the Thunder Megazord piloted by the Thunder Rangers in Power Rangers Ninja Storm). The axe unfolds from its ball form to deliver Gouraijin's finisher, the "Big Spin Booming Slash," in which the blade rotates like a windmill and cleaves the enemy apart. Pair the Plant Axe with the Double Horn Cutter drawn from Gouraijin's chest and it upgrades into the stronger Ax Cutter blade — a great example of how the Karakuri Balls merge with one another and with the robos into larger weapons.

As a DX toy, the Plant Axe was released by Bandai Japan as part of the individually sold "Karakuri Ball" series (Series 4). The little trick mechanism (karakuri = mechanism/gimmick) transforms the sphere into the axe and clips onto the DX robos, letting collectors arm Gouraijin exactly as seen on screen. The Plant Axe was also included in the sought-after Toys'R'Us-exclusive "DX Chogokin Tenrai Senpujin Special Version" set, bundled with Senpujin, Gouraijin, Tenkujin, the Sword Slasher, Tri-Condor and a clear Fuuraimaru — a must-have piece for Hurricaneger fans.