Seiyu GK (合同会社西友, Gōdō-gaisha Seiyū), or Seiyu Group (西友グループ, Seiyū Gurūpu), is a Japanese group of supermarkets, shopping centers and department stores, headquartered in Akabane (赤羽), Kita, Tokyo. The group was established in December 1946, and was formed in 1956 by Seibu Department Stores, a group company of Seibu Railway. In 1980, Seiyu launched its private brand Mujirushi-Ryōhin (commonly known as MUJI outside Japan). MUJI was transferred to the Ryohin Keikaku Company in 1990, and is no longer part of Seiyu. More information...
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