Shonan-Shinjuku Line and its rivals

Shonan-Shinjuku Line Map (General)

Shonan-Shinjuku Line is a major railway service in Tokyo, operated by JR East. Like Thameslink in London, Shonan-Shinjuku Line offers services from north to south and vice versa, going through the centre of the capital. It was first commenced in late-2001, and soon expanded again and again. Today, it is regarded as one of the most important and successful railway network in Japan.

Shonan-Shinjuku Line Map (Technical)

Technically, Shonan-Shinjuku Line is not registered on an official document. It consists of several existing lines as shown above. Before the Shonan-Shinjuku Line was launched, almost of all services on those lines started or terminated at Tokyo or Ueno, and all passengers had to take another train to continue their journeys. Shonan-Shinjuku Line, which provides direct services between them, made train journeys in the Greater Tokyo Area far more convenient and less troublesome than ever before.

E231 series for Shonan-Shinjuku Line

As JR East launched the Shonan-Shinjuku Line, rivals had to reconsider their strategies. To be specific, Tokyu and Odakyu have been working hard to win the competition against JR East, many of which have also been successful.

5000 series on Tokyu Toyoko Line

Tokyu Toyoko Line competes with Shonan-Shinjuku Line between Yokohama and Shibuya. Toyoko Line had been served by stopping and express services until March 2001, but Tokyu introduced a faster one (limited express). Tokyu has also been in competition with JR East between Yokohama and Shinjuku or even Ikebukuro since 2013, when through-services of Toyoko Line and Tokyo Metro Fukutoshin Line started. Tables below show their performance. Both Tokyu and JR East offer their fast services every 15 minutes.

Yokohama - Shibuya

	Journey time	Single fare
JR East	25-28 minutes	400 yen
Tokyu	27 minutes	280 yen

Yokohama - Shinjuku*

	Journey time	Single fare
JR East	30-33 minutes	570 yen
Tokyu	34 minutes	450 yen

*Shinjuku station of JR East and Shinjuku-sanchome station of Tokyo Metro.

Yokohama - Ikebukuro

	Journey time	Single fare
JR East	36-42 minutes	650 yen
Tokyu	41 minutes	480 yen

The tables show that fastest services of Shonan-Shinjuku Line are slightly faster than Tokyu's limited express, but fares are quite different. No wonder why many passengers from Yokohama prefer Tokyu to JR East.

Odakyu 3000 series

Odakyu also competes with Shonan-Shinjuku Line between Fujisawa and Shinjuku as well as Odawara and Shinjuku. Odakyu has been providing Romancecar services, which are even faster but expensive. Thus, the company introduced Shonan Express between Fujisawa and Shinjuku in 2002, which does not require any additional ticket. It was rearranged to Rapid Express in 2004, and most people prefer Odakyu to JR East.

Fujisawa - Shinjuku

	Journey time	Single fare	Frequency
JR East	49 minutes	900 yen	2 per hour
Odakyu	57 minutes	600 yen	3 per hour

Odawara - Shinjuku

	Journey time	Single fare	Frequency
JR East	77 minutes	1,520 yen	1 per hour
Odakyu	89 minutes	900 yen	3 per hour

It is even clearer than the JR-Tokyu competition that Odakyu takes longer but way cheaper than Shonan-Shinjuku Line. A return journey between Odawara and Shinjuku via Odakyu saves more than 1,200 yen, enough to have a wonderful lunch at a restaurant in Tokyo.

Tokyu and Odakyu provide cheaper services, but it does not mean at all that Shonan-Shinjuku Line is useless, as not all passengers can use an alternative option to JR East. In addition, if there had been no Shonan-Shinjuku Line, neither private railways would have changed their timetables with fast and reasonable train services. It might be a rare example of successful competition that is beneficial for railway users.