× Phyllosasa is a nothogenus (genus of hybrid origin) of Japanese bamboo in the grass family.

[3][4] It consists of a single nothospecies of bamboo, × Phyllosasa tranquillans, native to woodland in southern Honshu in Japan.

[5][6] It is considered to be a hybrid between Phyllostachys nigra var.

[6] It is a spreading, clump-forming bamboo growing to 2.5 m (8 ft) tall, with very dark green leaves 25 cm (10 in) or more in length.

The variegated cultivar 'Shiroshima' is found in cultivation.