An increasing number of hotels in Japan are offering “sleep tourism” experiences – stays designed to promote high-quality and restful sleep.The trend, which started gaining popularity overseas several years ago, provides hotels with an opportunity to attract new health-conscious guests.A sleep retreat plan called totono-ne, featuring the relaxing effects of tea, is proving a popular offering for Hotel 1899 Tokyo in the capital’s Shimbashi business district.The guests answer a set of simple...