To demonstrate an easy and low-cost propagation method for Cerasus×yedoensis ‘Somei-yoshino’, the influence of cutting season, culture environment, and media for stem cutting were investigated under the application of IBA (indole-3-butyric acid). Leafy softwood cuttings from the summer season showed a good survival rate. Among them, rooting rates were higher under an airtight closed culture and an intermittent air-mist. In the summertime closed culture, the proportions of woundwood formed, of rooted and of surviving cuttings, as well as and the mortality rate after rooting, differed with the cutting date and duration of airtight closure. The rooting and survival rates were 58.3 and 54.2%, respectively, and sometimes they reached 85.6 and 72.2%, when cutting was conducted in the later part of the rainy season and when airtight closure was maintained for approximately 30 days. There was a possibility that underground heating would promote the rooting in hardwood cuttings. No media were prominent. To optimize cutting conditions, further physiological study on the influence of temperature and light intensity on rooting and survival of cuttings during the culture period should be conducted.