the explosions can easily keep him in the air with the wings. Yahiko defeats Henya by gliding on a shōji door blown up by Henya's dynamite and attacking him from above. Henya is pardoned for his crimes and used as an army spy in Asia by the government because of his aviation abilities. Henya was modeled after Matsubayashi Henyasai, a swordsman in the early Edo period who possessed "avoidance techniques," which would now be called acrobatics in the modern era. Watsuki revealed that he originally planned to introduce Henya as a tengu during the Megumi arc as part of the Oniwabanshū. Still, that story was "not as well-planned as it otherwise might have been," so the chance was lost and Henya had to become one of the Juppongatana. It was originally planned for Henya to engage in a mid-air battle with Kenshin. Still, Watsuki felt that Kenshin had become too strong after learning the secret Hiten Mitsurugi-ryū technique, so Yahiko became his opponent instead. Henya's design model was a bat with a streamlined head and "a little bit" of Cyborg 002 from Cyborg 009. The author intended for Henya to be "monster-like" since none of the Juppongatana aside from Sōjirō were supposed to be "lookers." Watsuki reported that some people felt that Henya was "still too good-looking," so he made his body "super-emaciated." He said that Freak from Spawn was also a reference for Henya. Iwanbō , also known as , is a fat oaf and one of the Juppongatana sent to attack Aoi-Ya. He fights using small blades worn on his fingertips and his large body; his skin is too thick to cut. He is very stupid and says very little. Despite defeating four members of the Kyoto Oniwabanshū by himself, Iwanbō flees when Henya and Kamatari are defeated. After Shishio's defeat, Chō remarks that Iwanbō is too stupid to do anything on his own. Iwanbō is later shown to be a karakuri puppet controlled from the inside by Gein. Gein uses the new Iwanbō Version Three, Savage Mode to fight Kenshin during the Six Comrades' attack on Kamiya dojo. This version has unrestricted detachable joints, allowing every limb to move in any direction, and anti-piercing armor of woven steel protecting Gein inside. It is defeated when Kenshin lodges debris in its internal gears to stop its offense, and then destroyed by his strongest technique. Following having a "giant"