Fūma Kotarō Fūma clan . The clan was based in Kanagawa Prefecture , specializing in horseback guerrilla warfare and naval espionage . According to some sources , the family has roots in the 10th century when they served Taira no Masakado in his revolt against the Kyoto government . The use of the name started with the first leader ( " jonin " ) of the clan : originally surnamed " 風間 " ( Fūma ) , with a different kanji , it was later changed to homophone 風魔 . Each subsequent leader of the school adopted the same name as its founder , making it difficult to identify them individually . This school was in the service of the Hōjō clan of Odawara . Fūma Kotarō was the fifth and the best known of the Fūma clan leaders . Born in Sagami Province ( modern Kanagawa Prefecture ) on an unknown date , he became notorious as the leader of a band of 200 " Rappa " " battle disrupters " , divided into four groups : brigands , pirates , burglars and thieves . Kotarō served under Hōjō Ujimasa and Hōjō Ujinao . His biggest achievement came in 1580 , when the Fūma ninja covertly infiltrated and attacked a camp of the Takeda clan forces under Takeda Katsuyori at night , succeeding in causing severe chaos in the camp , which resulted in mass fratricide among the disoriented enemies . In 1590 , Toyotomi Hideyoshi laid siege to Odawara Castle , which eventually fell , and the Hōjō clan was forced to surrender . When the Tokugawa shogunate came to power , the remnants of Fūma - ryū were reduced to a band of brigands operating in and around Edo . A popular story says that in 1596 he was responsible for the death of Hattori Hanzō , a famous ninja in the service of Tokugawa Ieyasu , who had tracked him down in the Inland Sea , but Kotarō has succeeded in luring him into a small channel , where a tide trapped the Tokugawa gunboats and his men then set fire to the channel with oil . Kotarō was eventually caught by the shogunate ' s special law - enforcement force , guided by his rival and a former Takeda ninja Kosaka Jinnai ( 高坂甚内 ) , and executed through beheading by an order of Ieyasu in 1603 . In a folk legend , he is an inhuman figure : a monstrous giant ( 216 cm tall ) , supposedly part - oni ( ogre ) with inverted eyes . In popular culture . In various works of fiction , Fūma Kotarō is often depicted as Hattori Hanzō ' s arch - rival . As the name Fūma literally means " wind demon " , Fūma Kotarō ' s depiction is frequently more flamboyant , fantastical , and sometimes even demonic ; in contrast is Hanzō , who is usually rendered with a relatively subdued appearance . He is featured in the manga " Hana no Keiji : Kumo no Kanata ni " . In the Super Famicom video game of the same title , Fūma Kotarō is the final opponent that Keiji Maeda has to fight against . He is a main character in the " World Heroes " fighting game series ( as " Fuuma " , also featured in " Neo Geo Battle Coliseum " together with his main rival Hanzo ) and in " Getsu Fūma Den " , and is a player character in the video games " " ( as a young ninja in the service of the Hōjō clan , also returning in " Onimusha Tactics " ) and " Samurai Warriors 2 " along with its spin - off " Warriors Orochi " ( as Hanzō ' s foe , who , despite serving the Hōjō clan , prefers chaos and continually makes trouble for many factions ) . He is also featured in the video games " Nobunaga ' s Ambition II " , " Taikō Risshiden V " ( an unlockable player character ) , " Sengoku Basara 2 " ( initially as an NPC , he became playable in the " Heroes " edition ) , " Sengoku Basara 3 " , " Kessen III " ( an optional bonus character ) , " Persona 2 : Eternal Punishment " ( summonable as a persona ) , " Pokémon Conquest " ( playable character in a sidequest ) and " Shall We Date ? : Ninja Love " ( a romance option or the player character ) . He is featured in the manga series " Nabari no Ou " ( where he appears as the shape - shifting leader of the Fūma ninja village and an ally of the protagonist ) , and also makes an appearance in the light novel series " Mirage of Blaze " ( during the story arc involving the Hōjō clan ) , the manga series " Yaiba " ( revived by Onimaru ) , the manga and anime series " Samurai Deeper Kyo " ( as Sarutobi Sasuke ' s childhood friend and rival ) and " Karasu Tengu Kabuto " . The anime series " Sengoku Collection " features a female interpretation of Kotarō , being a servant to the female version of Imagawa Yoshimoto . His 18th century descendant Fūma Kotarō Kaneyoshi is the hero ' s nemesis through most of the TV series " The Samurai " , while a modern one is a player character in the video game " Ninja Commando " . The Fūma clan is also featured in the TV series " Shogun Iemitsu Shinobi Tabi " and the video games " Yakuza 2 " , " " and in the " Soul " series ( represented there by a runaway ninja Taki ; " Soul " s and " Tekken " s Yoshimitsu also used the Fumaken sword since " Tekken 6 " ) . Characters who are modern - day descendants of the Fūma clan include title characters in the manga series " Fūma no Kojirō " and the anime film " The Plot of the Fuma Clan " , as well as two of the main characters in the manga " X " . In the manga and anime series " Naruto " , the character Pain was revealed to have a body that originated from the Fūma clan when he kills his rival Hanzō ; there is also another Fūma clan . A very large shuriken is often called " Fuma Shuriken " .