Phyllospadix japonicus, known as Asian surfgrass, is a species of flowering plant in the family Zosteraceae. It is found along the seacoasts of Japan, Korea, and China (Hebei, Liaoning, Shandong). It grows in the intertidal zone along the shore.Makino, Tomitarô. 1897. Botanical Magazine (Tokyo) 11: 137.
Phyllospadix japonicus is a perennial herb that spreads by means of rhizomes. Its leaves are long, reaching up to 100 cm, though they are rarely more than 2.5 mm wide.Ohwi, J. (1984). Flora of Japan (in English): 1-1067. Smithsonian Institution, Washington, D.C.Czerepanov, S.K. (1995). Vascular Plants of Russia and Adjacent States (The Former USSR): 1-516. Cambridge University Press.Kharkevich, S.S. (ed.) (1987). Plantae Vasculares Orientalis Extremi Sovietici 2: 1-448. Nauka, Leningrad.Lee, W.T. (1996). Lineamenta Florae Koreae: 1-1688. Seoul: Ak'ademi Sojok.Kuo, J. & de Hertog, C. (2001). Seagrass taxonomy and identification key. Global Seagrass Research Methods: 31-78. Elsevier Science B.V., Amsterdam.
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