MRK Holdings Inc., together with its subsidiaries, engages in the women's underwear and related business in Japan. It operates through Women's Underwear and Related Businesses; Maternity and Baby Related Business; Wedding/Banquet Related Business; and Others segments. The company offers women's underwear, such as foundation and lingerie; body care cosmetics; custom-made insoles and specialized shoes; original supplements and health food; apparel and miscellaneous goods for women and babies; and maternity wear and nursing wear, maternity underwear, baby wear, and baby shower gifts. It is also involved in wedding and banquet related business; body shaping using women's underwear; operation of wedding halls, cafes, restaurants, and other food and beverage establishments, as well as hair salons; and event party activities. The company sells its products through directly managed stores, e-commerce sites, online shops, and e-commerce shopping malls. The company was formerly known as Maruko Co., Ltd. and changed its name to MRK Holdings Inc. in October 2018. MRK Holdings Inc. was incorporated in 1978 and is headquartered in Osaka, Japan. MRK Holdings Inc. is a subsidiary of RIZAP GROUP, Inc.