Translation guide
An octagon is an eight-sided polygon. In Japanese, the most common term is 八角形 (hakkakkei), used in geometry and everyday contexts. The word 八角形 can also refer to octagonal shapes in architecture or design. For specialized contexts like martial arts rings, the loanword オクタゴン (okutagon) is used.
Referring to an eight-sided polygon in mathematics, design, or general description.
Standard term for an octagon in geometry and everyday use. Can describe any octagonal shape.
Referring to the octagonal fighting area in sports like MMA.
Loanword from English, specifically used for the UFC octagon or similar fighting rings. Not used for geometric shapes.
選手がオクタゴンに入った。
The fighter entered the octagon.
この看板は八角形です。
This sign is an octagon.
八角形のテーブルを買いました。
I bought an octagonal table.
Abbreviation of 八角形, often used in compounds or when the context is clear. Slightly more casual or technical.
この建物は八角の塔がある。
This building has an octagonal tower.