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f(x) - 4 Walls (Japanese ver) Short Ver MV pic.twitter.com/lHEjDqbY1a
— 🇬🇹FRI.SAT.SUN🇸🇻 (@OliviaAldente) October 17, 2016
Source: avex
It looks like they either dubbed this over like YG does with their JPN MVs or this was in their vault, along with whatever other Japanese MVs they possibly have lol