Isshuu Kasumi

"Azure thunderclap. Fanged Ninja, KuwagaRaiger!"

Isshuu Kasumi (霞 一鍬, Kasumi Isshū) is Fanged Ninja KuwagaRaiger (牙忍クワガライジャー, Kibanin Kuwagaraijā) of the Gouraigers, and later the Hurricanegers.

Hurricaneger
The naive younger brother, called the "Fanged Ninja." He originally resented Ikazuchi for staying in the shadows for 500 years, idolizing his brother and respecting most of his decisions. But Isshuu took the fact they weren't rebuilding their Ninja school personally until he found the resting place of his father's sword, Kiraimaru. Desiring to rebuild the Ikazuchi School, Isshuu used the blade with disastrous results. But after learning to use the Kiraimaru in a way where his friends wouldn't be harmed, Isshuu decided to rebuild the school after Universal Stealth Group Jakanja was defeated. He was later shown to have feelings for Nanami Nono.

Gokaiger
Years later, Isshuu fought alongside not only his own team, but every single Sentai ranger in existence, against the Empire of Zangyack when it attacked the Earth in the Great Legend War. After fighting against hundreds of Gormin and their Zgormin commanders. AkaRenger noticed the fleet moving towards them, he gathered all the Rangers together and gave them the order to sacrifice their powers to wipe out the first invasion's armada.

After the Zangyack Empire was defeated by the Gokaigers, Marvelous returned the Ranger Keys to their original owners. Isshuu and his teammates have their powers again.

Akibaranger
Isshuu and Iskkou appear in a delusion in Hikonin Sentai Akibaranger Season 2 where they, not the Hurricaneger, were the lead characters of their Sentai season. They were joined in the Gouraiger by a third, yellow member.

10 Years After
to be added

Ranger Key
The KuwagaRaiger Ranger Key (クワガライジャーレンジャーキー) is Isshuu Kasumi's personal Ranger Key and what became of his powers after he along with the rest of the 34 Super Sentai sacrificed their powers to end the Great Legend War.

This key along with the majority of the Ranger Keys were collected by the Red Pirates and later used by the Gokaigers. The KuwagaRaiger Ranger Key was mainly used by Ahim de Famille (Gokai Pink), who used it to fight as KuwagaRaiger.
 * When the Gokaigers became the Hurricanegers and Gouraigers while fighting Action Commander Bongan.
 * When the Gokaigers became the Hurricanegers with Gouraigers and Shurikenger while fighting Action Commander Senden.
 * When Ahim and Don became the Gouraigers while fighting Zatsurig of the Imperial Guard.
 * When the Gokaigers became the Hurricanegers with Gouraigers and Shurikenger while fighting against Basco after Marvelous was incapacitated.
 * Alongside Gai (Shurikenger) and Don (KabutoRaiger) to take down an Avatar replica of Damaras.

After Zangyack were finally defeated, the Gokaigers gave the Ranger Keys back to their rightful owners. It is presumed that Isshuu received his key and became KuwagaRaiger once more.

Imitations
A copy of KuwagaRaiger was created by Madogi as part of the Fake Rangers. Madogi of the Phantom Beast Corps created evil duplicates of the Earth Ninja to draw out the real ones as part of Sandaaru's plan to trap them to lure out Gozen to destroy the barrier he made with the Raging Arrow medal. Though the the fakes were destroyed after this, this was part of Sandaaru's plan to take control of the Hurricanger, Gouraiger, as well as Shurikenger with special collars to force Gozen to feel sadness so he could remove the Grieving Bow medal she possessed from within her body.

Portrayal
Isshuu Kasumi is portrayed by Nobuo Kyo (姜 暢雄). As KuwagaRaiger, his suit actor was Yasuhiko Imai (今井 靖彦).