This article is about a/an transformation device in Kamen Rider, the original series.
The Typhoon (タイフーン,Taifun) is Kamen Rider 2's transformation belt which has the same functions just like Hongo. His belt has a red strap through the course of the series. Unlike Hongo's Typhoon belt however, Ichimonji's is affixed with an emblem of the Kamen Rider symbol, which splits open to reveal the Typhoon fan when he transforms into Kamen Rider 2.
Ichimonji's Typhoon belt originally operated differently from Hongo's, who initially needed to expose his Typhoon belt to strong gusts of wind in order to transform. Instead, Ichimonji needed to perform a set of arm movements to activate the belt, creating Kamen Rider's first henshin sequence. Hongo would later attain this ability himself after his upgrade.
The "Kamen Rider No.2 Typhoon" (left) and "Kamen Rider No.1 Typhoon" (right) was used to charge the Double Typhoon, Kamen Rider V3's henshin belt and first and foremost weapon. Shiro Kazami transforms into V3 by performing the "Henshin", a series of moves which activates the 2 revolving pistons of the Double Typhoon, and then converts the accumulated wind energy to transform Kazami into Kamen Rider V3. The combination of the Double Riders' Typhoons allows V3 to utilize both the "Strength" of No.2 and the "Skill" of No.1.