Visitors to Roppongi's SuperDeluxe last Friday arrived to find the basement venue decked out with tatami mats and a polite sign at the door asking them to remove their shoes on the way in. This was the setting for Wails to Whispers, one of the more conceptually ambitious events held during Red Bull Music Academy Tokyo, in which an evening of aural extremity featuring some of Japan's most abrasive underground icons gave way to an all-night ambient slumber party.