Iris japonica (also known as 'fringed iris', 'shaga' or 'butterfly flower') is a native of China and Japan. It is a species in the genus Iris, it is also in the subgenus of Limniris and in the Lophiris section. It is a rhizomatous perennial plant, with pale blue, lavender or white flowers with an orange or yellow crest. It is cultivated as an ornamental plant in temperate regions.