How to say "adjacent" in Japanese

• 隣となりJLPT N5approx.Common
  no-adjectiveThe basic 'next to' sense of adjacent: the adjoining room, the house next door, the seat beside you. This common word is normally what you want for one thing lying right next to another.
  ジョーダンさんは彼かれの隣となりに座すわった。↗

  Mr Jordan sat down beside him.
• アジェイサント
  prenominal modifierA katakana borrowing of English 'adjacent'. It is less common, and for saying that one thing lies next to another it is seldom the word you want; 隣 or 隣接した is the natural choice.
• 隣接したりんせつした
  prenominal modifierCovers the 'adjoining' and 'neighboring' senses of adjacent — rooms, buildings, plots of land, or areas that adjoin. Less common than 隣, it describes the relationship rather than naming the place next door.

For the basic 'next to' sense use the common 隣; 「隣接した」 describes adjoining or neighboring rooms, buildings, and areas; the loanword 「アジェイサント」 is less common and seldom what you need.

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

• 隣となりnext (to)
• アジェイサントadjacent
• 隣接したりんせつしたadjoining