Seeing no drop picture in boss' potential rewards area. Just a visual bug or something more serious?
Furthermore, Murakawa was supposed to be obtainable from Daily Missions too. Hope this is just a description mistake.
Update 1: As pointed out by several reports, the non-availability from boss fights is actually there and not just a visual bug.
Update 2: As pointed out by @capii and @SatanBete, this could be a classic daytime-savings time change thing. For new players ou