Translation guide
The material used for paving roads, driveways, and surfaces. In Japanese, the most common term is アスファルト, a loanword from English. There is also a native term 瀝青 (れきせい), but it is technical and rarely used in everyday conversation.
asphalt
The black, sticky substance used to make roads, parking lots, and similar surfaces.
The standard term for asphalt in Japanese. Used in everyday conversation, signage, and technical contexts.
This road is paved with asphalt.
A technical or formal term for asphalt or bitumen. Rarely used in daily speech; more common in engineering or chemistry contexts.
I'm looking for an asphalt parking lot.
Asphalt is also used as a waterproofing material.