地盤

じばん

(the) ground

JLPT N2

Character Breakdown

Meaning and Usage

"地盤" primarily refers to the physical ground or soil that supports buildings and structures. It is often used in construction and engineering contexts to discuss the stability and strength of the land.

Common Collocations

  • 地盤調査 (じばんちょうさ): ground survey, used to assess soil conditions before construction.
  • 地盤が強い/弱い: strong/weak ground, indicating the stability of the soil.
  • 地盤を固める: literally "to solidify the ground," but also used metaphorically to mean strengthening one's base or foundation, especially in politics or business.

Nuances and Register

The term is mostly neutral and technical but can be used metaphorically in social or political contexts. It is common in formal and semi-formal speech, especially in news, reports, and professional discussions.

Common Learner Mistake

Learners sometimes confuse "地盤" with "土地" (とち), which means "land" or "plot of land" more generally. "地盤" specifically refers to the ground's physical condition or foundation, not just the land area.

Example Sentences

このちいきのじばんはとてもつよいので、おおきなたてものをたててもあんしんです。

The ground in this area is very strong, so it's safe to build large buildings.

じばんちょうさのけっか、ここはえきじょうかのきけんがあるとはんめいした。

As a result of the ground survey, it was found that there is a risk of liquefaction here.

かれはじばんをかためるために、ちいきのひとびととしんらいかんけいをきずいた。

He built trust with the local people to strengthen his political base.