Kaiju Arc

Spanning volumes 8 and 9 and chapters 63 through 73, this is the manga's sixth arc and the sixth chapter of the Kintama Hunt Saga, positioned between the Evil Eye Arc and the Space Globalists Arc and adapted in episodes 21 through 24 of the second season. The search for another of Okarun's kintama at an apartment complex draws Momo, Okarun, Aira, Jiji, and their classmate Kinta Sakata into battle against a kaiju. The arc introduces Kinta, the alien girl Bamora, and the offensive use of nanoskin to form a giant robot.

With the Ayase house repaired, daily life resumes. The Evil Eye, now behaving since his deal with Okarun, slips out at school when Jiji takes a cold drink, and Momo spends the day minding the childlike yokai. She overhears a rumor about an Apartment Complex Ghost in the shape of a golden ball and, assuming it is Okarun's kintama, recruits him to investigate. A classmate named Kinta Sakata, hoping to learn Okarun's supposed charm with girls, tails them and misreads their talk of kintama as the secret being dirty talk.

At the complex, the golden ball proves to have a physical body and knocks Okarun back. After it throws Kinta from the building and turns invisible, Kinta uses his sci-fi knowledge to deduce it can be seen from three sides. Momo grabs it for Okarun to ram, sending it crashing out of the building, and the trio is stunned to find it is a kaiju. It grows gigantic and chases them into Empty Space. When Okarun and Aira exhaust their powers, Momo hauls everyone home, where she spots the glowing nanoskin in the walls and Okarun devises a plan.

Unable to control the nanoskin himself, Okarun yields to Kinta, who reshapes the house into a giant robot. Disappointed it comes out shaped like a Buddha, he still dubs it the Great Kinta Bodhisattva, Zeta Version. After frantic button-mashing, Kinta discovers he can pilot the mecha by visualizing its movements and remodels it in his image. The kaiju turns invisible to gain the upper hand, but Momo and Aira apply their powers to expose it and finish it with a devastating powerbomb.

Sent back to reality, the group returns the mecha to house form. Okarun and Jiji find a zipper on the kaiju's body and unzip it to reveal an alien girl, who kisses Okarun on waking, enraging Momo. Through a makeshift translator from Mantisian, they learn she is Bamora and that she sought a powerful person to fight and marry upon losing. She insists Okarun is that person, though Kinta, the actual pilot, protests in vain. Bamora joins the Family for dinner, deepening Momo's jealousy. Elsewhere, after Jiji briefly wears Bamora's exosuit, a transmission reaches a suited alien who has just wiped out the Serpo.

The arc introduces Kinta Sakata, whose love of science fiction and dedication to piloting a mecha make him the ideal wielder of Ludris' nanoskin, and gives Rin Sawaki an appearance foreshadowing her crush on Okarun's vampire look. Momo comes to see Okarun as cool as he makes friends on his own. Bamora, piloting the invisible kaiju suit, is introduced; her automatic defense system fought without her control. Empty Space opens a third time, presenting the Family's first foe their yokai powers alone cannot beat. Kinta's misunderstanding with Jiji over the sweat warning strains their friendship, while his crude talk and pride alienate the girls. Okarun nearly broke his promise to ask the Evil Eye for help before Kinta pulled through. Bamora kisses Okarun believing she must procreate with her conqueror under Banga's order, fueling Momo's suspicion and jealousy, and Kinta's claim as the true victor is ignored. The Serpo base is raided by the Kur, introducing the advance unit leader Hastur and leaving the surviving Rokuro scarred, while Jiji's use of the exosuit sends a signal that brings the Kur down on the Family in the following arc.