|Owner||Harmony Rail Transit (Joban)|
|Termini||Central South Lamtsu|
|Operator(s)||Harmony Rail Transit (Joban)|
|Depot(s)||Fung Yuen Depot|
|Opened||1st March 2022|
|Track gauge||1435 mm|
The Seiyo Shinkansen (西予新幹線) is a line of the Joban Shinkansen network, connecting Central South in Fuka, Joban with Lamtsu in Sorano, the two biggest cities in the area. The line is jointly operated by Harmony Rail Transit (Joban) and Kowloon-Canton Railway Company. Harmony Rail Transit (Joban) operates the line far into the borders of Harmony Rail Transit (Lamtsu). it is a southward continuation of the Tohoku Shinkansen and serves other major cities such as Fung Yuen. The Shinkansen route is one of the shortest in the world, with the distance between some stations being comparable to the North-South Line. The Galaxy completes the trip from Central South to Lamtsu in 20 minutes, reaching a maximum speed of 200km/h. The Nagano and Shima Shinkansens continue the route eastwards towards Joetsu Prefecture.
As of June 2022, the following rolling stock operates on the Seiyo Shinkansen:
All stations on the Seiyo Shinkansen are operated by Harmony Rail Transit (Joban), with the exception of Lamtsu which is operated by Harmony Rail Transit (Lamtsu). Twinkle services stop at all stations, Twilight services have varying stopping patterns and Galaxy services skip all stations in-between Lamtsu and Central South. All trains stop at Lamtsu and Central south. The Lamtsu Railway Pass is not valid for travel on Galaxy services.
|●||All trains stop|
|｜||All trains pass|
|▲||Some trains stop|
|Central South||中環南||●||●||●||0.0||5.2||Tohoku Shinkansen||Central||Joban|
|Fung Yuen||●||▲||｜||12.3||17.5||Fung Yuen Line||Fung Yuen|
|Shin-Haebaru||●||▲||｜||28.3||33.5||Haebaru Railway Haebaru Main Line||Iwate Prefecture||Sorano|
|Tai Hing||●|||||｜||42.6||47.8||Hakone Line||Lamtsu|