also: ショプインショップ
noun
shop-in-shop; in-store shop
A branded section or boutique located inside a larger retail store, such as a department store or shopping mall.
デパートの一階に新しい化粧品のショップインショップがオープンした。
A new cosmetics shop-in-shop opened on the first floor of the department store.
Variant with interpuncts, sometimes seen in formal or design contexts.
Irregular kana usage; likely a typo or nonstandard variant.
インショップ is a more general term for a small shop inside a larger facility, while ショップインショップ specifically refers to a branded boutique within a retail store.
Loanword from English 'shop-in-shop'.