Wikipedia
Tennin (天人), which may include tenshi (天使), ten no tsukai (天の使い, lit. heavenly messenger), hiten (飛天, lit. flying heaven) and the specifically female tennyo (天女) are spiritual beings found in Japanese Buddhism that are similar to western angels, nymphs or fairies. They were imported from Chinese Buddhism, which was influenced itself by the concepts of heavenly beings found in Indian Buddhism and Chinese Taoism.
Tennin are mentioned in Buddhist sutras, and these descriptions form the basis for depictions of the beings in Japanese art, sculpture, and theater. They are usually pictured as unnaturally beautiful women dressed in ornate, colorful kimonos (traditionally in five colors), exquisite jewelry, and flowing scarves that wrap loosely around their bodies. They usually carry lotus blossoms as a symbol of enlightenment or play musical instruments such as the biwa, or flute.
Tennin are believed to live in the Buddhist heaven as the companions to the Buddhas and Bodhisattvas. Some legends also make certain tennin solitary creatures living on mountain peaks. Pilgrims sometimes climb these mountains in order to meet the holy spirits.
Tennin can fly, a fact generally indicated in art by their colored or feathered kimonos, called hagoromo (羽衣, lit. feather dress). In some legends, tennin are unable to fly without these kimonos (and thus cannot return to heaven). More rarely, they are shown with feathered wings. In a Noh play Hagoromo, which bears a number of similarities to the Western swan maiden legends, tennyo come to the earth and take off their hagoromo. A fisherman spies them and hides their clothes in order to force one to marry him. After some years he tells his wife what he did, and she finds her clothes and returns to heaven. The legend says it occurred on the beach of Miho no Matsubara, now a part of the city of Shizuoka.
was a after Kajō and before Ten'ei. This period spanned the years from August 1108 through July 1110. The reigning emperor was .