Omorikaigan

Weekday departures: 219/day · Sat & holiday departures: 3/day in the available timetable data

First / last departure (weekday): 5:03 / 24:15 (00:15 next day)

Busiest hour: 16:00–17:00 (14)

0:00 ─ 23:00

Figures are typical departures in the timetable data, not a live service count.

Timetable data as of 5 May 2026.

Weekday figures cover every line at this station. For Saturdays and holidays the timetable data is incomplete for some or all lines, so those figures are departures in the available timetable data, not totals.

Lines where the timetable data is incomplete:

• Keikyu Main Line: no Saturday, Sunday or holiday timetable

• Keikyu Main Line: Tachiaigawa ⇄ Heiwajima

Ōmorikaigan Station opened on 1 February 1901 as Yawata Station when the Keihin Electric Railway extended its line from Kawasaki to a station then in front of Ōmori. On 8 May 1904 the main line was extended from this station to Shinagawa; the existing track to Ōmori became a branch and the station was renamed Kaigan ("seaside") Station. The Ōmori branch was abolished on 8 March 1937. The present name Ōmorikaigan dates from 1 July 1933. The up track was raised onto a viaduct on 20 January 1970 and the down track on 1 December 1970, completing the station's conversion to an elevated station. Keikyu assigned the station number KK07 on 21 October 2010, and the sub-name "Shinagawa Aquarium" was added on 14 March 2020.

Despite the "Ōmori" prefix usually pointing to Ōta Ward, most of the station actually sits in Shinagawa — the platform straddles the ward border with only a portion in Ōta.