Translation guide
To set boundaries, limits, or distinctions. In Japanese, this is expressed through verbs for drawing lines, setting borders, or defining differences, depending on whether the context is physical, abstract, or metaphorical.
To physically mark or draw a line that separates areas, such as on a map, field, or floor.
Literally 'draw a line'. The most common and natural way to express physically demarcating an area.
グラウンドに白線を引いてエリアを区切った。
We drew white lines on the ground to demarcate the area.
Specifically 'draw a boundary line'. Used for clear, often official demarcation.
地図上に境界線を引いて領土を明確にした。
They drew a boundary line on the map to demarcate the territory.
To partition or divide into sections. Often used for land, lots, or rooms.
土地を区画して住宅地として販売する。
They demarcate the land into lots and sell them as residential areas.
To establish a clear difference or boundary between concepts, roles, or categories.
Metaphorical 'draw a line'. Used for setting boundaries between abstract things like responsibilities or definitions.
仕事とプライベートの線引きをしっかりするべきだ。
You should clearly demarcate between work and private life.
To distinguish or differentiate. Emphasizes recognizing the difference rather than actively creating a boundary.
この二つの概念は明確に区別する必要がある。
We need to clearly demarcate these two concepts.
Formal expression meaning 'to define a boundary'. Suitable for academic or legal contexts.
倫理と法律の境界を定めるのは難しい。
It is difficult to demarcate the boundary between ethics and law.
To define the limits of something, such as a project, authority, or discussion.
Literally 'decide the scope'. Natural for setting boundaries of a task or topic.
プロジェクトの範囲を明確に決めておきましょう。
Let's clearly demarcate the scope of the project.
To limit or restrict. Used when demarcating by setting constraints.
議論の対象をこの問題に限定する。
We will demarcate the discussion to this issue.
「線を引く」 is for physical lines; 「線引きする」 is for abstract boundaries. Using the wrong one can sound odd.
駐車場に線を引く。
Draw lines in the parking lot.
公私の線引きをする。
Demarcate between public and private matters.
There is no single Japanese verb that covers all uses of 'demarcate'. Using a dictionary form like 「デマーケートする」 is not natural. Choose the expression based on context.