Onsen Retreat and Spa Group Public Company Limited provides wellness, spa, hospitality, and dining services in Thailand and internationally. The company operates integrated thermal bath retreats, day spas, and complementary food and beverage establishments. Its primary operations and offerings include authentic Japanese-style onsen bathing facilities equipped with natural mineral baths, carbonated soda baths, microbubble jet baths, cold plunge pools, Finnish saunas, and steam rooms; holistic spa and body therapies comprising traditional Thai massage, herbal compress treatments, aromatherapy oil massages, deep tissue therapies, body scrubs, and customized facial treatments under the Yunomori Onsen & Spa and KLAI Spa brands; express massage and relaxation services tailored for urban lifestyles under the PAK Massage brand; Japanese culinary and beverage services operated under the in-house Happy Rice restaurant concept; and the retail sale of branded spa merchandise, organic skincare products, and wellness lifestyle amenities. Founded in 2011 and headquartered in Bangkok, Thailand, the company serves local consumers, urban professionals, and international travelers across prime locations in Bangkok and Pattaya, as well as an overseas operation in Singapore. In recent developments, Onsen Retreat and Spa Group completed its initial public offering on the Stock Exchange of Thailand under the ticker symbol ONSENS in October 2025, raising capital to fund corporate growth, reduce outstanding debt, and finance capital expenditures. Group strategic initiatives include the flagship development of the Thong Lor Soi 17 Social Wellness Space in Bangkok, an integrated lifestyle complex featuring thermal spas and commercial rental spaces; the brand rollout of KLAI Spa with an inaugural flagship in Bangkok’s Yaowarat district focusing on modernized Thai healing arts; and an ongoing network expansion plan targeting the opening of eight new wellness branches across domestic and regional markets.