Semiarundinaria fastuosa

About

Semiarundinaria fastuosa, the Narihira bamboo, Narihira cane or Narihiradake, is a species of flowering plant in the grass family Poaceae, native to Japan. Growing to 7 m (23 ft) tall by 2 m (7 ft) broad, it is a vigorous, evergreen bamboo with dark green cylindrical canes and dense tufts of lanceolate, glossy green leaves, up to 20 cm (8 in) long.

Summary from Wikipedia