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{{Short description|Railway line in Aichi prefecture, Japan}}
{{Infobox rail line
 | name          = Aichi Loop Line
 | color         = 0000CD <!-- MediumBlue -->
 | logo          = Aikan logomark.svg
 | logo_width    = 50px
 | logo_alt      = Logo of Aichi Loop Line
 | image         = Aikan Series2000-G7.jpg
 | image_width   = 300px
 | image_alt     =
 | caption       = Local train approaching [[Mutsuna Station]]
 | type          = [[Commuter rail]]
 | system        =
 | status        =
 | locale        = [[Aichi Prefecture]]
 | start         = {{STN|Okazaki|x}}
 | end           = {{STN|Kōzōji|x}}
 | stations      = 23
 | routes        =
 | open          = 31 January 1988
 | close         =
 | owner         =
 | operator      = Aichi Loop Railway
 | depot         =
 | stock         = [[Aichi Loop Railway 2000 series]]
 | linelength_km = 45.3
 | tracklength   = 
 | tracks        =
 | gauge         = {{track gauge|1067mm|lk=on}}
 | old_gauge     =
 | minradius     =
 | electrification = 1,500 V DC
 | speed_km/h    = 110
 | website       =
 | map           = [[File:Aichi Loop Line Area Map.png|center|300px|Map of Aichi loop line and other nearby lines]]
 | map_state     = 
}}

The {{nihongo|'''Aichi Loop Line'''|愛知環状鉄道線|Aichi Kanjō Tetsudō-sen|"Aichi Loop Railway Line"}} is a Japanese railway line connecting [[Okazaki Station]] in [[Okazaki, Aichi|Okazaki]] and [[Kōzōji Station]] in [[Kasugai, Aichi|Kasugai]], operated by the {{nihongo|'''Aichi Loop Railway'''|愛知環状鉄道|Aichi Kanjō Tetsudō}}. The company or the line is abbreviated as {{nihongo|'''Aikan'''|愛環}}. This is the only line the company operates. Despite its name, the line is not a true loop, but a north-south line situated east of [[Nagoya, Aichi|Nagoya]], which can be considered as an unclosed loop (with the JR [[Tōkaidō Main Line|Tokaido line]] and [[Chūō Main Line|Chuo Line]] serving as the portions of the circle).

The Aichi Loop Railway is a [[Third-sector railway|third-sector]] company, with shares held by public sector such as [[Aichi Prefecture]], the city of [[Toyota, Aichi|Toyota]], and also by private companies. Unlike typical third-sector lines in Japan, the Aichi Loop Line makes a profit,{{Citation needed|date=November 2024}} since the line functions as a [[commuter rail]] line for nearby [[Toyota|Toyota Motor]] factories.

==Basic data==
*Operators, distances: 
**[[Aichi Loop Railway]] (Category 1)
***Okazaki – Kōzōji: 45.3&nbsp;km (ca. 28.1&nbsp;mi.)
**[[Japan Freight Railway Company]] (Category 2)
***Okazaki – Kita-Okazaki: 5.3&nbsp;km (ca. 3.3&nbsp;mi.)
***[[Freight train|Freight]] operation ceased in 1999.
*Track:
**Double: Naka-Okazaki – Kita-Okazaki, Kitano-Masuzuka – Mikawa-Kamigō, Mikawa-Toyota – Shin-Toyota, Setoshi – Kōzōji
**Single: the rest
*[[Railway signalling]]: Automatic ([[Automatic train stop|ATS-ST]])

==Services==
There are no rapid services. All trains stop at every station. Three to four trains run per hour.

==Station list==
* All stations are located in [[Aichi Prefecture]].
* Trains can pass each other at stations marked "◇", "^", and "v".

{| class="wikitable"
|-
!rowspan="2"|Station<br/>No.
!rowspan="2"|Station
!rowspan="2"|Japanese
!colspan="2"|Distance (km)
!rowspan="2"|Transfers
!rowspan="2"|&nbsp;
!rowspan="2"|Location
|-
!Between<br/>stations
!Total
|-
!01
|{{STN|Okazaki|x}}
|岡崎
|style="text-align:right;"|-
|style="text-align:right;"|0.0
|[[Tōkaidō Main Line]]
|style="text-align:center;"|｜
|rowspan="6"|[[Okazaki, Aichi|Okazaki]]
|-
!02
|{{STN|Mutsuna|x}}
|六名
|style="text-align:right;"|1.7
|style="text-align:right;"|1.7
|&nbsp;
|style="text-align:center;"|◇
|-
!03
|{{STN|Naka-Okazaki|x}}
|中岡崎
|style="text-align:right;"|1.7
|style="text-align:right;"|3.4
|[[Meitetsu Nagoya Line]] ({{STN|Okazaki-Kōen-Mae|x}})
|style="text-align:center;"|^
|-
!04
|{{STN|Kita-Okazaki|x}}
|北岡崎
|style="text-align:right;"|1.9
|style="text-align:right;"|5.3
|&nbsp;
|style="text-align:center;"|v
|-
!05
|{{STN|Daimon|x|Aichi}}
|大門
|style="text-align:right;"|1.2
|style="text-align:right;"|6.5
|&nbsp;
|style="text-align:center;"|｜
|-
!06
|{{STN|Kitano-Masuzuka|x}}
|北野桝塚
|style="text-align:right;"|2.2
|style="text-align:right;"|8.7
|&nbsp;
|style="text-align:center;"|^
|-
!07
|{{STN|Mikawa-Kamigō|x}}
|三河上郷
|style="text-align:right;"|2.0
|style="text-align:right;"|10.7
|&nbsp;
|style="text-align:center;"|v
|rowspan="12"|[[Toyota, Aichi|Toyota]]
|-
!08
|{{STN|Ekaku|x}}
|永覚
|style="text-align:right;"|1.7
|style="text-align:right;"|12.4
|&nbsp;
|style="text-align:center;"|｜
|-
!09
|{{STN|Suenohara|x}}
|末野原
|style="text-align:right;"|1.6
|style="text-align:right;"|14.0
|&nbsp;
|style="text-align:center;"|◇
|-
!10
|{{STN|Mikawa-Toyota|x}}
|三河豊田
|style="text-align:right;"|1.9
|style="text-align:right;"|15.9
|&nbsp;
|style="text-align:center;"|^
|-
!11
|{{STN|Shin-Uwagoromo|x}}
|新上挙母
|style="text-align:right;"|1.7
|style="text-align:right;"|17.6
|[[Meitetsu Mikawa Line]] ({{STN|Uwagoromo|x}})
|style="text-align:center;"|∥
|-
!12
|{{STN|Shin-Toyota|x}}
|新豊田
|style="text-align:right;"|1.9
|style="text-align:right;"|19.5
|[[Meitetsu Mikawa Line]] ({{STN|Toyotashi|x}})
|style="text-align:center;"|v
|-
!13
|{{STN|Aikan-Umetsubo|x}}
|愛環梅坪
|style="text-align:right;"|2.0
|style="text-align:right;"|21.5
|&nbsp;
|style="text-align:center;"|｜
|-
!14
|{{STN|Shigō|x}}
|四郷
|style="text-align:right;"|2.0
|style="text-align:right;"|23.5
|&nbsp;
|style="text-align:center;"|◇
|-
!15
|{{STN|Kaizu|x}}
|貝津
|style="text-align:right;"|2.0
|style="text-align:right;"|25.5
|&nbsp;
|style="text-align:center;"|｜
|-
!16
|{{STN|Homi|x}}
|保見
|style="text-align:right;"|1.3
|style="text-align:right;"|26.8
|&nbsp;
|style="text-align:center;"|◇
|-
!17
|{{STN|Sasabara|x}}
|篠原
|style="text-align:right;"|2.4
|style="text-align:right;"|29.2
|&nbsp;
|style="text-align:center;"|◇
|-
!18
|{{STN|Yakusa|x}}
|八草
|style="text-align:right;"|2.8
|style="text-align:right;"|32.0
|[[Linimo]] (L09)
|style="text-align:center;"|◇
|-
!19
|{{STN|Yamaguchi|x|Aichi}}
|山口
|style="text-align:right;"|2.6
|style="text-align:right;"|34.6
|&nbsp;
|style="text-align:center;"|◇
|rowspan="4"|[[Seto, Aichi|Seto]]
|-
!20
|{{STN|Setoguchi|x}}
|瀬戸口
|style="text-align:right;"|2.1
|style="text-align:right;"|36.7
|&nbsp;
|style="text-align:center;"|◇
|-
!21
|{{STN|Setoshi|x}}
|瀬戸市
|style="text-align:right;"|2.4
|style="text-align:right;"|39.1
|[[Meitetsu Seto Line]] ({{STN|Shin-Seto|x}})
|style="text-align:center;"|^
|-
!22
|{{STN|Nakamizuno|x}}
|中水野
|style="text-align:right;"|2.8
|style="text-align:right;"|41.9
|&nbsp;
|style="text-align:center;"|∥
|-
!23
|{{STN|Kōzōji|x}}
|高蔵寺
|style="text-align:right;"|3.4
|style="text-align:right;"|45.3
|[[Chūō Main Line]]<ref group="*">(some trains through to/from {{STN|Nagoya|x}})</ref>
|style="text-align:center;"|∥
|[[Kasugai, Aichi|Kasugai]]
|}

<references group="*"/>

==Rolling stock==
Services are operated by a fleet of 2-car [[Aichi Loop Railway 2000 series|2000 series]] EMUs.<ref name="jrrprivate2012">{{cite book |title = 私鉄車両編成表 2012 |trans-title=Private Railway Rolling Stock Formations - 2012| publisher = JRR | date = July 2012 | location = Japan | page = 97| isbn = 978-4-330-29911-2}}</ref>

==History==
The first section of the line between Okazaki and Kitano-Masuzuka opened in 1970 as the {{nihongo|Okata Line|岡多線}}, a [[Freight train|freight rail]] line of [[Japanese National Railways]] (JNR). The section between Kitano-Masuzuka and Shin-Toyota was extended and the whole line started a passenger service in 1976.

Another part of the line, between Setoshi and Kōzōji, was originally planned as the JNR [[Tōkai Transport Service Jōhoku Line|Seto Line]], a (later cancelled) freight line. The Okata Line, merged with the planned Seto Line route and the link between two, was renamed the Aichi Loop Line in 1988.

The newly founded Aichi Loop Line Company took over the line from [[Central Japan Railway Company]] (JR Central), with services starting on 31 January 1988.<ref name="terada2013">{{cite book | last = Terada | first = Hirokazu |title = データブック日本の私鉄 |trans-title=Databook: Japan's Private Railways | publisher = Neko Publishing | date = 19 January 2013 | location = Japan | page = 110| isbn = 978-4-7770-1336-4}}</ref>

Beginning on 1 October 2005, through-service began over the JR [[Chuo Main Line]] to [[Nagoya Station]].<ref name="terada2013"/> This service has since been discontinued.{{When|date=November 2024}}

==See also==
*[[List of railway lines in Japan]]
*[[Tōkai Transport Service Jōhoku Line]]
*[[Musashino Line]], semi-closed outer loop around Tokyo
*[[Osaka Higashi Line]]

==References==
{{Reflist}}

==External links==
{{Commons category}}
* {{Official website|http://www.aikanrailway.co.jp}} {{in lang|ja}}

{{Nagoya transit}}

[[Category:Rail transport in Aichi Prefecture]]
[[Category:Rail transport in Nagoya]]
[[Category:1067 mm gauge railways in Japan]]
[[Category:Japanese third-sector railway lines]]
[[Category:Railway lines opened in 1988]]
[[Category:1988 establishments in Japan]]