In another of his works, Yukiko is the most westernized of the title characters.  
He claimed that the west's pure-white skin allowed westerners to adopt bright lights, and exalted elegant toilets in one work, and he told of a beautiful woman who gets a "prostitute spider" emblazoned on her body in another.  This author of "In Praise of Shadows" and "The Tattooer" wrote of a centipede bite killing Tsuneko in a work by this author that sees Tadasu fantasize about breastfeeding.  In another of his works, Yukiko is the most westernized of the title characters.  In addition to "The Bridge of Dreams," he wrote a novel in which Kaname and Misako's marriage dissolves.  For 10 points, name this Japanese author of Some Prefer Nettles and The Makioka Sisters.
He claimed that the west's pure-white skin allowed westerners to adopt bright lights, and exalted elegant toilets in one work, and he told of a beautiful woman who gets a "prostitute spider" emblazoned on her body in another.  
Junichiro Tanizaki [accept in either order]