Igasaki Clan is a family kin group consisting of ninjas since the Sengoku period. They developed and harbored the Ninninger's powers. Back in 1571, an evil feudal warlord named Gengetsu Kibaoni tried to unite Japan under fear.
The ninjas of the Igasaki Clan fought him and emerged victorious but before his death, Kibaoni vowed to return in 444 years to resume his campaign. As a result, Kibaoni sacrificed his humanity to be revived as an oni centuries later before he was sealed away by Yoshitaka Igasaki using 48 Sealing Shuriken. However, Yoshitaka choose to seal Kibaoni instead of eliminating him with the End Shuriken under mysterious circumstances.
Publication Information
- Ninningers : Igasaki Clan
- Japanese : 伊賀崎氏
- Greater Loacation : Japan
- Monarch : Ninjas Clan Since Sengoku period
- Leaders : Yoshitaka Igasaki
- Season : Shuriken Sentai Ninninger
Yet, his fight with Kibaoni was far from the intended year for Kibaoni to rise in power. In 2015, after 444 years of Kibaoni's death, Kyuemon Izayoi, a former pupil of Yoshitaka that betrayed him released Kibaoni from his seal and the Sealing Shurikens that entrapped him were used to create more of his Youkai battalion. Having expected this, Yoshitaka choose five of his grandchildren and hired them as the Ninningers, in hopes of stopping Kibaoni and his minions.
Distant Ancestor
Doshun Igasaki

- Doshun Igasaki
- Doshun Igasaki was a ninja who lived in the Warring States period who, being of the Igasaki Clan, particpated in the defeat of the evil feudal warlord Gengetsu Kibaoni, who intended to unite Japan under fear, in 1571. He is an ancestor of the Last Ninja, Yoshitaka Igasaki, and by extension his grandchildren, the five Ninningers, both of whom would fight the reprisals of Kibaoni that would emerge over the following centuries. Doshun Igasaki was acknowledged by Yoshitaka in his book I am the Last Ninja.
- Appeareance : Ninninger Shinobi 12
Doshun is in fact a real historical figure, he was an intermediate-ranking Iga ninja of the Sengoku Period, Tateoka Doshun, whom was also known by the name Igasaki Doshun. The Igasaki Clan of Ninninger is named in homage to him, similar to the five protagonists of Ninja Sentai Kakuranger who were named after five legendary ninja.
Former Last Ninja

- Former Last Ninja
- The former Last Ninj was the father of Yoshitaka Igasaki and thus the great-grandfather of the five Ninningers. As per the tradition of the Igasaki ninja, he was eventually defeated and allowed himself to be slain by the young Yoshitaka Igasaki, who became the new Last Ninja through the inheritance of his father's Nintality upon his death.
- Appeareance : Ninninger Shinobi 44
- Potrayer : Riichi Seike
Yoshitaka Igasaki

- Main Article : Yoshitaka Igasaki
- Known as the Last Ninja is the Ninningers' grandfather who sealed Gengetsu Kibaoni away when he revived as an oni. He was originally believed to have died prior to the series but he went into hiding while building the Otomonin in secret.
Tsumuji Igasaki

- Main Article : Tsumuji Igasaki
- Is Takaharu and Fuka's father and Yoshitaka's oldest son. He trained since childhood in order to succeed his father until one day his ability to use ninjutsu was stolen by Kyuemon, and thus uses all his knowledge to train the Ninningers instead. He is also the one who created the Ninja Ichibantou for them to use.
Takaharu Igasaki : 1st Born

- Main Article : Takaharu Igasaki
- Is the leader of the Ninningers who is an impulsive optimist who acts like a big brother to his team mates. Out of the group, Takaharu is most adamant of being a ninja and wishes to become the kind of ninja his grandfather is.

- Main Article : Kasumi Momochi
- Is a university student who aims to be a scientist and normally very reserved despite being unable to take a hint or having a sharp-tongue at times. She becomes the pink-colored Momo Ninger. After the final battle against Gengetsu Kibaoni, Kasumi decides to continue research the secrets behind the Ninningers' arsenal through her scientific studies.

- Main Article : Yakumo Katou
- Has a cold demeanor despite his quick temper. Yakumo was originally in England to learn magic until he was called back to Japan. Though a realist who doesn't really see a need to carry out his grandfather's legacy, he decides to prove himself better skilled at the Shuriken Ninja Arts. He becomes the blue-colored Ao Ninger, whose signature attack is the Ninja Dragon Slash.

- Main Article : Fuuka Igasaki
- Is Takaharu's sister who is very reliable but a bit clumsy, initially believing her clan's history with Kibaoni to be a fairy tale. Just like Nagi, she is a high schooler and becomes the white-colored Shiro Ninger. After the final battle against Gengetsu Kibaoni, Fuka sets her sights on becoming an idol and uses her ninjutsu as one of her talents.

- Main Article : Nagi Matsuo
- Is very friendly, yet surprisingly observant with both a prankster streak and a desire to master various things. He is the youngest member of the team who becomes the yellow-colored Ki Ninger. With the Chozetsu Shobu Changer, Ki Ninger can become Ki Ninger Chozetsu. After the final battle against Gengetsu Kibaoni, Nagi studies to get into university.
Yoshiharu Igasaki

- Yoshiharu Igasaki
- Is Takaharu's son who comes from the future to stop the battle between the Zyuohgers and the Ninningers. He transforms into his own version of Aka Ninger. He appears exclusively in the film Doubutsu Sentai Zyuohger vs. Ninninger the Movie: Super Sentai's Message from the Future.