How to say "rotary" in Japanese

• ロータリーCommon
  nounCovers the road sense: a circular intersection where traffic flows around a central island. This is the common everyday word, a loanword, and the one you will usually hear and want.
• 円形交差点えんけいこうさてん
  nounA less common, more descriptive term for the same road feature, literally a 'circular intersection'. Understandable but seldom the word you want in ordinary conversation; ロータリー is usually preferred.
• ラウンドアバウト
  nounAnother loanword covering the same road sense. Less common than ロータリー in Japanese, though it matches the English 'roundabout' directly and may appear in contexts influenced by British usage.
• 環状交差点かんじょうこうさてん
  nounA less common, formal-sounding term for a roundabout or traffic circle, literally a 'ring-shaped intersection'. More at home in technical or official descriptions than in everyday speech.

For the road-sense of 'rotary', 「ロータリー」 is the common everyday choice; the other three are less common, more technical or explicit names for roundabouts and traffic circles.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• ロータリーrotary
• 円形交差点えんけいこうさてんroundabout
• ラウンドアバウトroundabout
• 環状交差点かんじょうこうさてんroundabout