The Japanese name for some species of abalone native to the waters of Korea and Japan, whose nacre is frequently used in raden. The nacre from these species of abalone exhibit an attractive iridescence with colours from a wide range of the spectrum, with none of the distinctive dark banding distinctive to most other species of abalone. It is used in thin sheets called usugai and kenma.
Scientientific classification Haliotis madaka or Haliotis gigantea, Haliotis spp.
See also: ao-gai, mijingai-nuri
Literaly: abalone. Also: awabi-gai