Explore Words Kanji Grammar Guides

Copyright © 2026 Kotomora. All Rights Reserved.

Get the Kotomora apps for iOS and Android.

Explore Words Kanji Grammar Guides About Support Privacy

Copyright © 2026 Kotomora. All Rights Reserved.

分水界 (bunsuikai) Japanese meaning: watershed | Kotomora

分ぶん水すい界かい

ぶ

ん

す

い

か

い

Meanings

1

watershed; divide

Geographical term for the boundary separating drainage basins; used in hydrology and geography.

この山さん脈みゃくが太たい平へい洋よう側がわと日本にほん海

かい

側がわ

の

分ぶん

水すい

界かい

に

なっ

て

いる

。

This mountain range forms the watershed between the Pacific side and the Sea of Japan side.

Kanji

分part, minute of time, segment
水water
界world, boundary

Built from

分ぶん+水すい界かい

Etymology

Compound of 分水 (bunsui, 'dividing water') + 界 (kai, 'boundary'). The derivation is transparent from the kanji components.