東経(とうけい) とうけい noun east longitude geography 1. east longitude The angular distance east of the prime meridian, measured in degrees. Used to specify locations east of the prime meridian (Greenwich). 東京(とうきょう)は東経(とうけい)139度(ど)に位置(いち)している。🔊 Tokyo is located at 139 degrees east longitude. 東経(とうけい)135度(ど)が日本(にほん)の標準時(ひょうじゅんじ)の基準(きじゅん)だ。🔊 135 degrees east longitude is the basis for Japan Standard Time. この島(しま)は東経(とうけい)150度(ど)、北緯(ほくい)35度(ど)に位置(いち)する。🔊 This island is located at 150 degrees east longitude and 35 degrees north latitude. 東経(とうけい) is the opposite of 西経(せいけい) (west longitude).Forms東(とう) (east) + 経(けい) (longitude) = east longitudeRelated words西経(せいけい): west longitude北緯(ほくい): north latitude南緯(なんい): south latitude経度(けいど): longitude緯度(いど): latitude本初(ほんしょ)子午線(しごせん): prime meridianUsageTypically expressed as 東経(とうけい)〜度(ど) (〜 degrees east longitude). Related Words Antonym: 西経(せいけい) (west longitude) Related: 経度(けいど) (longitude) Related: 緯度(いど) (latitude) general Added 2026.2.4 22:51 · Revised 2026.9.2 13:01 10000/10004_toukei