Don't want to nit pick, but the winglet is actually there for a purpose. It was added originally as a way to get 12 feet extra wing and keep the a/c footprint the same as the -300. As an aside, the winglets were found to decrease induced drag when compared to the classic wing.
There is a CDL penalty that has to be applied if the winglets are missing.
JAL operates some -400D which are domestic and don't have winglets. Of course, they don't have the same MAX TOW as the normal -400s.