Since then, old-fashioned Japanese iron bathtubs have been gruesomely known as goemon-?­buro. 
This refers to the bloody tale of Goemon who died from a nasty fall in a bathtub.
mnli hypothesis: This refers to the bloody tale of Goemon who died from a nasty fall in a bathtub. premise: Since then, old-fashioned Japanese iron bathtubs have been gruesomely known as goemon-?­buro. 