地下(ちか)

Compounds

• 地下鉄(ちかてつ) (subway, underground railway)
• 地下街(ちかがい) (underground shopping area)
• 地下室(ちかしつ) (basement room)
• 地下水(ちかすい) (groundwater)
• 地下道(ちかどう) (underground passage)

Floor notation

• 地下(ちか)1階(かい) (B1F - first basement floor)
• 地下(ちか)2階(かい) (B2F - second basement floor)

Similar words

• 地下(ちか) (underground) ↔ 地上(ちじょう) (above ground)

Cultural note: Japanese cities have extensive 地下街(ちかがい) (underground shopping malls) and 地下鉄(ちかてつ) systems, especially in major cities like Tokyo and Osaka.