What is "genkai"

Genkai may refer to:

• Genkai, Saga, a town in Saga Prefecture, Japan
• Genkai Sea or Genkainada, a sea in Japan
• Genkai (Dictionary), a Japanese dictionary written by Otsuki Fumihiko
• Genkai (YuYu Hakusho), a fictional character in the anime and manga series YuYu Hakusho
• Genkai shūraku, a term for Japanese villages that are in trouble of disappearing