樹海(じゅかい)

じゅかい
noun
sea of trees; dense forest
nature
1. sea of trees; dense forest
A vast, dense forest that looks like a sea when viewed from above. Most famously associated with Aokigahara at the base of Mt. Fuji.
樹海(じゅかい)の中(なか)は暗(くら)い。
It's dark inside the sea of trees.
富士山(ふじさん)のふもとに広大(こうだい)な樹海(じゅかい)が広(ひろ)がっている。
A vast sea of trees stretches out at the foot of Mt. Fuji.
上空(じょうくう)から見(み)ると、山々(やまやま)を覆(おお)う樹海(じゅかい)がまるで緑(みどり)の海(うみ)のように見(み)えた。
Viewed from above, the sea of trees covering the mountains looked just like a green ocean.

A poetic compound of 樹(じゅ) (tree) and 海(かい) (sea), describing a forest so vast and dense that it resembles an ocean when seen from a high vantage point.

Common collocations

Cultural note

The word is strongly associated with 青木ヶ原樹海(あおきがはらじゅかい) (Aokigahara), the dense forest at the base of 富士山(ふじさん). This forest, formed on hardened lava, is known for its thick canopy and easy-to-get-lost terrain. It has unfortunately also become associated with suicide, a topic handled sensitively in Japanese media.

Related Words

Compare: 深(ふか)い森(もり) (deep forest)
general
Added 2026.3.31 2:12 · Revised 2026.9.2 13:02
20500/20810_jukai