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.
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.
"A monster with one eye and one leg, said to live deep in the mountains of Kumano, Japan. A single footprint measuring 30cm, said to belong to Ippon-datara, was sighted in the mountain's snows."
—Devil Summoner: Soul Hackers 3DS compendium
Devil Summoner: Raidou Kuzunoha vs The Soulless ArmyEdit
"A monster with one eye and one leg, said to live deep in the mountains of Kumano, Japan. A single footprint measuring 30 centimeters has been sighted in the mountain's snows."
—Devil Summoner devil chart
Devil Summoner 2: Raidou Kuzunoha vs. King AbaddonEdit
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.
"A one-eyed, one-legged monster said to live deep in the mountains of Kumano, Japan. It's believed to be the degraded blacksmith god, Ame no Me-Hitotsu no Kami."
—Persona 5 background
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.
"A monster with one eye and one leg, said to live deep in the mountains of Japan, though its appearance varies from story to story. On the snowy paths of Mt.Kumano, a trail of single footprints is the only evidence of its existence."