Ryohin Keikaku Co., Ltd. , or Muji is a Japanese retailer which sells a wide variety of household and consumer goods. Muji's design philosophy is minimalist, and it places an emphasis on recycling, reducing production and packaging waste, and a no-logo or "no-brand" policy. The name Muji is derived from the first part of Mujirushi Ryōhin, translated as No-Brand Quality Goods on Muji's European website.

Seiyu KK , or Seiyu Group , is a Japanese group of supermarkets, shopping centers and department stores, headquartered in Akabane (赤羽), Kita, Tokyo. On May 8, 2023, the Akabane headquarters office was relocated due to the redevelopment of Seiyu's Akabane store site. The current head office location is Kichijoji Honmachi, Musashino City, Tokyo.