San ai Resort at LUMINE EST Shinjuku

San-ai Resort is a swimwear and lingerie retailer on the 4th floor of Lumine Est Shinjuku, offering stylish resort wear and functional innerwear for every season.

San-ai Resort is a swimwear and lingerie boutique on the 4th floor of Lumine Est Shinjuku, part of the San-ai group that has been a leading name in Japanese swimwear since 1955. The brand operates under two labels: San-ai Resort, focused on fashionable swimwear and resort wear, and northerly, its innerwear and loungewear line. The Lumine Est Shinjuku branch is one of the brand's key Tokyo locations, catering to the young, fashion-conscious shoppers who frequent the Lumine department stores.

The swimwear selection ranges from bikinis and tankinis to one-piece suits and UV-protection rash guards, with three-piece sets starting from around 13,000 yen. The brand's philosophy of Everyday Resort Life extends beyond the beach, with water-friendly pieces designed to transition from pool to cafe. The northerly innerwear line combines the company's decades of lingerie manufacturing expertise with functional, comfortable designs, including yoga and activewear pieces. The shop also offers a bra-fitting service to help customers find the right size, which is particularly valued in Japan where sizing guidance can be inconsistent.

Lumine Est Shinjuku is directly connected to Shinjuku Station, making the shop easy to visit during a shopping trip or commute. Opening hours follow the Lumine Est schedule, typically 11:00 to 21:00. The store's tax-free service is available for international visitors, and the knowledgeable staff can assist with fitting and style selection. For anyone planning a beach holiday or seeking quality innerwear in Shinjuku, San-ai Resort offers a well-curated, specialist selection.