Phyllospadix japonicus, known as Asian surfgrass,[2] is a plant species found along the seacoasts of Japan, Korea, and China (Hebei, Liaoning, Shandong).

It grows in the intertidal zone along the shore.

[3] 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.

[4][5][6][7][8][9]