The meridian 123° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Asia, the Pacific Ocean, the Indian Ocean, Australia, the Southern Ocean, and Antarctica to the South Pole.

The 123rd meridian east forms a great circle with the 57th meridian west.

From Pole to Pole
Starting at the North Pole and heading south to the South Pole, the 123rd meridian east passes through:

{| class="wikitable plainrowheaders"
! scope="col" width="130" | Co-ordinates
! scope="col" | Country, territory or sea
! scope="col" | Notes
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Arctic Ocean
| style="background:#b0e0e6;" |
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Laptev Sea
| style="background:#b0e0e6;" |
|-valign="top"
| 
! scope="row" | 
| Sakha Republic Amur Oblast — from 
|-valign="top"
| 
! scope="row" | 
| Heilongjiang Inner Mongolia — from  Heilongjiang — from  Inner Mongolia — from  Jilin — from  Inner Mongolia — from  Liaoning — from 
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Yellow Sea
| style="background:#b0e0e6;" | Passing just east of the Shandong Peninsula, Shandong,  (at )
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | East China Sea
| style="background:#b0e0e6;" | Passing just east of the Zhoushan archipelago, Zhejiang,  (at )
|-
| 
! scope="row" | 
| Okinawa Prefecture — island of Yonaguni
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Pacific Ocean
| style="background:#b0e0e6;" | Philippine Sea
|-
| 
! scope="row" | 
| Island of Luzon
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Ragay Gulf
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Island of Burias
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Sibuyan Sea
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Island of Panay
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Guimaras Strait
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Island of Negros
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Sulu Sea
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Island of Mindanao
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Celebes Sea
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Island of Sulawesi (Minahassa Peninsula)
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Gulf of Tomini
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Island of Sulawesi (East Peninsula)
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Peleng Straits
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Island of Peleng
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Banda Sea
| style="background:#b0e0e6;" | Passing just west of the island of Manui,  (at )
|-
| 
! scope="row" | 
| Island of Wowoni
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Banda Sea
| style="background:#b0e0e6;" | Passing just east of the island of Sulawesi,  (at )
|-
| 
! scope="row" | 
| Island of Buton
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Banda Sea
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Island of Buton
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Banda Sea
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Islands of Flores, Adonara and Solor
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Savu Sea
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Island of Rote
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Indian Ocean
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Ashmore and Cartier Islands
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Indian Ocean
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| Western Australia
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Indian Ocean
| style="background:#b0e0e6;" | Australian authorities consider this to be part of the Southern Ocean
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | Southern Ocean
| style="background:#b0e0e6;" |
|-valign="top"
| 
! scope="row" | Antarctica
| Australian Antarctic Territory, claimed by 
|-
|}

See also
122nd meridian east
124th meridian east

References

e123 meridian east
동경 123도(東經123度)는 본초 자오선에서 동쪽으로 123도 떨어진 경선이다. 북극점에서 시작하여 북극해, 아시아, 태평양, 인도양, 오스트랄라시아, 남극해, 남극을 거쳐 남극점에 이른다.

동경 123도는 서경 57도와 이어져 지구의 둘레를 이룬다.

북극점에서 남극점까지 동경 123도선은 다음 지역을 지나간다.

{| class="wikitable plainrowheaders"
! scope="col" width="125" | 좌표
! scope="col" | 나라, 지역, 해역
! scope="col" | 주석
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 북극해
| style="background:#b0e0e6;" |
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 랍테프해
| style="background:#b0e0e6;" |
|-valign="top"
| 
! scope="row" | 
| 사하 공화국 아무르주
|-valign="top"
| 
! scope="row" | 
| 헤이룽장성 내몽골 자치구 헤이룽장성 내몽골 자치구 지린성 내몽골 자치구 랴오닝성
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 황해
| style="background:#b0e0e6;" |  산둥성 산둥반도 () 바로 동쪽을 지나감
|-valign="top"
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 동중국해
| style="background:#b0e0e6;" |  저장성 저우산 군도 () 바로 동쪽을 지나감
|-
| 
! scope="row" | 
| 오키나와현 요나구니섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 태평양
| style="background:#b0e0e6;" | 필리핀해
|-
| 
! scope="row" | 
| 루손섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 라가이만
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 부리아스섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 시부얀해
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 파나이섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 기마라스 해협
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 네그로스섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 술루해
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 민다나오섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 셀레베스해
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 술라웨시섬 미나하사반도
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 토미니만
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 술라웨시섬 티무르반도
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 펠렝 해협
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 펠렝섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 반다해
| style="background:#b0e0e6;" |  마누이섬 () 바로 서쪽을 지나감
|-
| 
! scope="row" | 
| 워워니섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 반다해
| style="background:#b0e0e6;" |  술라웨시섬  () 바로 동쪽을 지나감
|-
| 
! scope="row" | 
| 부톤섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 반다해
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 부톤섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 반다해
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 플로레스섬, 아도나라섬, 솔로르섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 사부해
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 로테섬
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 인도양
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 애시모어 카르티에 제도
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 인도양
| style="background:#b0e0e6;" |
|-
| 
! scope="row" | 
| 웨스턴오스트레일리아주
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 인도양
| style="background:#b0e0e6;" | 오스트레일리아 정부는 이 해역을 남극해의 일부로 본다.
|-
| style="background:#b0e0e6;" | 
! scope="row" style="background:#b0e0e6;" | 남극해
| style="background:#b0e0e6;" |
|-valign="top"
| 
! scope="row" | 남극
| 오스트레일리아령 남극 지역, 가 영유권을 주장한다.
|-
|}

더 보기 
 동경 122도
 동경 124도

동경 123도