Kuroi Jukai (黒い樹海?) literally means "the black sea of trees," and commonly refers to:
- another name for Aokigahara, the forest around Mt. Fuji in Japan, sometimes simply called "jukai," ("Sea of Trees")
- 1960 novel by Seichō Matsumoto,"Kuroi Jukai".
Kuroi Jukai (黒い樹海?) literally means "the black sea of trees," and commonly refers to: