Founded in 1994, Paradise Plan developed Yukishio with the aim of capturing the distinctive mineral character of Miyakojima's underground seawater. Recognized by Guinness World Records in 2000 for its high mineral content, the company uses a patented instant-evaporation method on underground seawater to create a fine, powdery, and mildly bitter-free salt helping establish it as one of Okinawa's most recognisable regional food products.
Unlike conventional sea salts that rely on large-scale evaporation or high heat, seawater used for Yukishio is drawn from approximately 22 metres below ground, where it has passed naturally through layers of Ryukyu limestone and coral. This geological filtration removes impurities and enriches the water with dissolved minerals before any concentration takes place. The filtered seawater is then gently processed at low temperatures, preserving its mineral composition while forming exceptionally light, ultra fine snow-like salt.
Today, Paradise Plan continues to produce Yukishio exclusively on Miyakojima, where it has become closely associated with the island's culinary identity and remains one of Japan's most distinctive speciality salts.