f(x) the 1st concert DIMENSION 4 - Docking Station in JAPAN: The debut concert tour of South Korean girl group f(x) launched in support of their fourth studio album, 4 Walls. It consisted of three shows in Seoul, South Korea, and eight shows throughout Japan. The tour commenced at the Olympic Hall in Seoul, and concluded at the Yokohama Arena in Yokohama, Japan. A concert DVD, f(x) Dimension 4 – Docking Station in Japan, was released on July 6, 2016, in Japan.