Maho Katagiri (Rin Mizuhara) was a villainess from "The Osaka Double Mystery - The Naniwa Swordsman and Toyotomi's Castle", episode 10.09 of Case Closed (airdate January 7, 2002, manga volumes 31: File 8 ~ 32: File 4). Her backstory revealed the reason why Maho was visiting the Osaka Castle: she was in search of a legendary treasure rumored to have been hidden in Osaka Castle left behind by Toyotomi Hideyoshi (though the episode ultimately revealed the treasure didn't exist). Thirteen years prior to the episode's events, the evil Maho conspired with several of her other tourist group mates (their leader Hirano, Yuji Kato, and Ariharo Kasuya) to kill Makiyoshi Wakisaka, as they had learned he was in possession of the Tiger Scroll--which revealed the location of the alleged treasure--and was planning to have the scroll donated as a national treasure. The villainous colleagues went about killing Makiyoshi by setting him ablaze and leaving his corpse in a moat.
Another member of the tourist group was Shigehiko Wakisaka, Makiyoshi's grandson, and Shigehiko eventually deduced that his grandfather had been killed by Maho and his other colleagues after finding a photograph of them all with the scroll. Enraged at the group for their callous and greedy deed, Shigehiko plotted to kill them in revenge, with Maho being his third victim after killing Hirano and Yuji. Shigehiko went about killing Maho by luring her to a bridge after Yuji's murder, claiming that he would show her where the scroll was. Instead, Shigehiko killed Maho by bludgeoning her to death before throwing her body in the river below, later dousing her corpse in kerosene and setting it ablaze as part of a trick to make it appear that Maho had committed suicide.
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