For 10 points, often depicted in tiger-skins and carrying large clubs, these are, what Japanese demons?
The Jikkinsho includes a story in which one of these creatures gifts the flute "Twinleaf" to Hakuga no Sammi, and Sammi recovers the imperial biwa "Genjo" from one of these creatures hidden in a gate in a tale in the Konjaku Monogatarishu. A hermit reincarnates as one of these creatures in order to seduce the Somedono Empress in another story, while in the Tale of the Heike, Yorimasa kills one of these creatures, which hid in a black cloud every night and tormented the Konoe Emperor with nightmares. In his Otogizoshi, Dazai Osamu writes about a drunken old man whose dancing at a party of these creatures causes them to remove a wen from his face, but Dazai refuses to treat a story about a peach-born boy defeating an army of these creatures, since he himself is not "Nippon-ichi", unlike that hero, Momotaro. For 10 points, often depicted in tiger-skins and carrying large clubs, these are, what Japanese demons?
The Jikkinsho includes a story in which one of these creatures gifts the flute "Twinleaf" to Hakuga no Sammi, and Sammi recovers the imperial biwa "Genjo" from one of these creatures hidden in a gate in a tale in the Konjaku Monogatarishu.
Oni [prompt on "Demons" before it is said; prompt on "Ogres" or "Yokai"]