地平線(ちへいせん)

地平線(ちへいせん) refers specifically to the horizon as seen over land — the line where flat ground meets the sky. Combines 地(ち) (earth) + 平(へい) (flat) + 線(せん) (line).

COMMON COLLOCATIONS:

• 地平線(ちへいせん)が見(み)える (the horizon is visible)
• 地平線(ちへいせん)に沈(しず)む (to set on the horizon)
• 地平線(ちへいせん)の向(む)こう (beyond the horizon)
• 地平線(ちへいせん)から昇(のぼ)る (to rise from the horizon)

LAND VS. SEA HORIZON:

• 地平線(ちへいせん): horizon over land (地(ち) = earth/ground)
• 水平線(すいへいせん): horizon at sea (水(すい) = water)

This distinction does not exist in English, which uses "horizon" for both.

USAGE:
Best visible in flat landscapes like 草原(そうげん) (grasslands), 砂漠(さばく) (deserts), and 平野(へいや) (plains). In mountainous Japan, the 地平線(ちへいせん) is rarely visible, making it a somewhat romantic or literary image.