Unkai Terrace (雲海テラス, unkai terasu) is located 1,088 meters above sea level on Mount Tomamu in the Hoshino Resort Tomamu area. The kanji for Unkai translates to sea of clouds. The terrace is most famous for having a view above the clouds. The Unkai Terrace started to utilize the ski lift in 2005 for visitors to use to reach it. In the first year of its operation only 909 visitors went to the location and now their busiest day has 2,000 people going to the terrace. There are three types of sea clouds that might be seen from the terrace. The Pacific Ocean-grown Unkai is created when the warm south wind is driven by the high-pressure of the Pacific Ocean. This creates massive low clouds also known as sea fog coming from the eastern part of Hokkaido. If there is an overflow of clouds it is possible for the terrace to be covered, but if it is too weak then the Hidaka Mountain will block it. Tomamu-grown Unkai is created in the night when it is calm and clear.
