is a high-speed Shinkansen service operated on the Nishi Kyushu Shinkansen by the Kyushu Railway Company (JR Kyushu) in Japan. It runs between and , where it connects with the Relay Kamome service, which continues between Takeo-Onsen and via the Kagoshima, Nagasaki and Sasebo lines.
Prior to 23 September 2022, Kamome trains operated the full route between Nagasaki and Hakata. On that date, the name was transferred to the new Nishi Kyushu Shinkansen service, and the remaining limited express services between Takeo-Onsen and Hakata were renamed Relay Kamome.
The Kamome name (written as ) was first used from 1 July 1937 on limited express services operating between and . These services operated until February 1943.
The Kamome name (now written as ) was revived on 15 March 1953 for limited express services operating between and Hakata. This iteration was discontinued in March 1975 following the completion of the San'yà  Shinkansen extension to Hakata.
On 1 July 1976, following the electrification of the Nagasaki Main Line, Kamome services resumedâÂÂinitially between and Nagasaki, and later between Hakata and NagasakiâÂÂusing 485 series EMUs.
The service in its current form began on 23 September 2022 with the opening of the Nishi Kyushu Shinkansen section between Takeo-Onsen and Nagasaki. With the Shinkansen becoming the primary route to Nagasaki, the Kamome name was reassigned to services operating on the newly constructed Shinkansen line.
On 28 October 2020, JR Kyushu announced that a six-car version of the N700S series would be used on the isolated Shinkansen section serving Nagasaki, officially named the Nishi Kyushu Shinkansen. Services would feature a cross-platform interchange at with a connecting limited express service branded as Relay Kamome, providing onward connections to Hakata.
JR Kyushu also confirmed that the Kamome name, in continuous use since 1961, would be retained for the Nishi Kyushu Shinkansen services. Most Kamome Shinkansen services stop at all stations between Takeo-Onsen and Nagasaki, although some services pass through Ureshino-Onsen, and a limited number stop only at Isahaya. Between Takeo-Onsen and Hakata, the limited express Relay Kamome continues to operate as a non-Shinkansen service and is expected to do so until the Shinkansen is extended to Hakata. Some Midori services also operate in conjunction with Relay Kamome, branded as "Midori (Relay Kamome)".
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