Translation guide
The English word "sphere" can refer to a round 3D shape, a domain of activity or knowledge, or a social circle. This guide covers natural Japanese expressions for each meaning.
A perfectly round three-dimensional object like a ball or globe.
The most common word for a sphere in geometry and everyday contexts. Can also mean ball or globe.
The Earth is not a perfect sphere.
Please calculate the volume of this sphere.
Emphasizes the three-dimensional spherical shape, often used in technical or descriptive contexts.
The sculpture is a perfect sphere.
Refers to a spherical shape or form, often used to describe objects that are sphere-like.
This lamp has a spherical shape.
A particular area of activity, interest, or expertise.
The most versatile word for a field or domain of activity, study, or work.
He is famous in the sphere of science.
We will expand into a new sphere of business.
Often used for a sphere of influence, territory, or a specialized area. Slightly more formal than 分野.
That is outside my sphere of expertise.
Means scope or range, and can be used for a sphere of activity or responsibility.
This problem is beyond my sphere of responsibility.
A particular social world or group of people with shared interests.
Literally 'world', but commonly used for a distinct social sphere or community.
He is well-known in the art sphere.
Children tend to retreat into their own sphere.
A suffix meaning 'world' or 'circle', used in compounds like 政界 (political sphere) or 財界 (financial sphere).
He has influence in the political sphere.
A suffix meaning 'sphere' or 'zone', often used in formal or technical contexts like 経済圏 (economic sphere).
This region forms its own cultural sphere.
The English 'sphere' in phrases like 'sphere of influence' or 'social sphere' is not directly translated as 球. Use 分野, 領域, or 世界 depending on the nuance.
分野 is the most common and neutral word for a field or domain. 領域 implies a more clearly bounded area, often with a sense of territory or specialized domain.