Ippon-Datara

Ippon-Datara is a recurring demon in the series.

History
The Ippon-Datara is a rarely spotted youkai due to its innate shyness driving it away from urban areas. Hermitting himself in the mountains of Japan, it is best known to lurk in the mountains bordering the Wakayama and Nara prefectures, though there have been sightings within their immediate neighboring prefectures. Their method of locomotion is by hopping around and doing somersaults. While normally wanting nothing to do with humans, once a year, on December 20th, if a human and Ippon-Datara meet, they will squash the humans unfortunate enough underfoot, and is such considered an unlucky day in those prefectures, and are urged to stay away from the mountains.

The Ippon-datara is said to resemble a one footed, cyclopoid blacksmith, having lost both from working his trade, being blinded by the light of his forge and working the bellows with one of his legs. Alternative theories have implied Ippon-datara's origins as a woodcutter who lopped off their leg as penance for some crime, a killer boar that attacked humans that was bound by a priest that was allowed to attack again on Dec. 20th, or a mountain kami who was corrupted into becoming a youkai, much like Nozuchi or Hitotsume-kozou.

Appearances

 * Shin Megami Tensei: Strange Journey: Jaki Race
 * Shin Megami Tensei IV: Jaki Race
 * Shin Megami Tensei IV DEMONIC GENE
 * Shin Megami Tensei IV Apocalypse: Jaki Race
 * Shin Megami Tensei V: Brute Race
 * Devil Summoner: Soul Hackers: Jaki Race
 * Devil Summoner: Raidou Kuzunoha vs. The Soulless Army: Skill Order
 * Devil Summoner 2: Raidou Kuzunoha vs. King Abaddon: Skill Order
 * Devil Summoner: Raidou Kuzunoha vs. The Lone Marebito
 * Soul Hackers 2: Jaki Race
 * Persona 4 / Golden: Hermit Arcana
 * Persona Q: Shadow of the Labyrinth: Hermit Arcana
 * Persona 5 / Royal: Hermit Arcana
 * Persona Q2: New Cinema Labyrinth: Hermit Arcana
 * Shin Megami Tensei Trading Card: Card Summoner: Jaki Race
 * Shin Megami Tensei: Liberation Dx2: Jaki Race

Devil Summoner: Soul Hackers
Kaneko's design for Ippon-Datara, much like Melchizedek and Zaou-Gongen's, draws inspiration from a Todd McFarlane design, the Spawn figure Grave Digger in particular, which was released five months before Soul Hackers release in Japan. Aside from this design serving as inspiration, Kaneko has also revealed that he is a collector of Spawn figures.

Shin Megami Tensei IV
Ippon-Datara can be found in Shinjuku. He can teach Flynn the Fang Breaker, Tarukaja and Maragi skills through his Demon Whisper.

Ippon-Datara also appears as an opponent in the Challenge Quest, "Training Battle 1." In this battle, he will alternate between using the Heat Wave and Maragi skills. Flynn, Dzelarhons, and Pyro Jack will automatically repel its Maragi attacks. As it only lasts one turn, the Tetrakarn skill needs to be reserved for turns where Ippon-Datara uses Heat Wave, otherwise the party will be wiped out. Ippon-Datara will always use Heat Wave on the first battle turn. Additionally, Flynn's gun is equipped with poison rounds, which can inflict additional damage on Ippon-Datara if he becomes afflicted with Poison status.

Shin Megami Tensei IV Apocalypse
Ippon-Datara can be found within Kanda-no-yashiro. He can bestow the Power Punch, Mudo and Oni-Kagura skills through his Demon Whisper. He receives a decent bonus to any Physical skills learned.

Ippon-Datara later becomes the focus of a quest for the Hunter Association, called "Flying Sparks, Rolling Water." Tatara of the Artisans' Union puts out a request for a hunter to bring them an Ippon-Datara, so that it may provide them instructions on smelting techniques for creating weapons.

Shin Megami Tensei V
Ippon-Datara appears as a follower of Leanan Sidhe, seeking her guidance in improving his skills in the "The Spirit of Love" subquest. If the protagonist moves to fulfill the request of Apsaras, or doesn't accept the "The Water Nymph" subquest, he will join Leanan Sidhe in fighting the protagonist and his party.

Devil Summoner: Raidou Kuzunoha vs The Soulless Army
Ippon-datara begins appearing during random encounters within the Dark Realm of Fukagawa-Cho. Being a demon of the Skill Order, he can only be captured through Confinement during a Full Moon Phase.

He will later appear on the factory floor of the Daidouji Factory, outside of the Matrix Labyrinth.

In battle, Ippon-datara's normal attack consists of grabbing his enemy with his tongs and delivering three light hammer strikes.

Devil Summoner 2: Raidou Kuzunoha vs. King Abaddon
An Ippon-Datara serving Dr. Victor is disguised as a maid, and gives Raidou Kuzunoha the XIV the doctor's first request. He shows up later to tell Raidou about his master's new branch of Sword Fusion, while complaining about the maid outfit.

Soul Hackers 2
Ippon-Datara appears as a common enemy in Subway Line 14.

Persona 4
Ippon-Datara is a Persona of the Hermit Arcana. He can be obtained by Fusion or as a result of Shuffle Time in the Marukyu Striptease dungeon.

Ippon-Datara is one of the Personas that Margaret requests as part of increasing her Social Link and building the Empress Arcana. As her first request, to reach the 2nd rank in her Social Link, she asks to see an Ippon-Datara that has inherited the skill Sukukaja. It can be obtained by fusing either a level 10 Ghoul with a Yomotsu-Shikome, or by fusing a Sylph with either an Archangel, a Lilim or a Cu Sith.

Persona 5
Ippon-Datara is the third Persona of the Hermit Arcana and can be found as a Shadow in Madarame's Palace and the Chemdah area of Mementos, with the title "Embittered Blacksmith." He is the second of two Personas to learn the Resist Dizzy skill and the first Persona to learn the Rampage and Counter skills. When itemized through Electric Chair execution in the Velvet Room, Ippon-Datara yields a Sledgehammer skill card.

Yasuo Jochi's Shadow takes the form of Ippon-Datara during the request "Who's Muscling in Yongen-Jaya?" Shadow Jochi waits at the end of the Path of Kaitul in Mementos.

Shin Megami Tensei V
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Devil Summoner: Soul Hackers
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Devil Summoner: Raidou Kuzunoha vs. The Soulless Army
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Soul Hackers 2
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Persona 5 / Royal
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Trivia

 * When having a favorable conversation with a randomly encountered Ippon-Datara in Raidou Kuzunoha vs. King Abaddon, Ippon-Datara will sometimes say that he will wear a maid outfit for Raidou.