The is one of the two main railway lines of Japanese private railway company Nankai Electric Railway, together with Kōya Line. The route is from Namba Station in south downtown of Osaka to Wakayamashi Station in Wakayama via Sakai, Izumiōtsu, Kishiwada, Kaizuka, Izumisano, Sennan, Hannan and Misaki municipalities. The proper name is with the company's name, "the Nankai Main Line", not simply "the Main Line" often seen in other Japanese private railways. Lines of the Nankai Main Lane and the connecting lines excluded the Kōya Line and the Airport Line are named generically "". The line is shown with a pictogram of waves, or distinguished with blue from conifer or green Kōya Line.

Route data Line length: Track: quadruple from Namba to Suminoe (to Kishinosato-Tamade, eastern two tracks are for Kōya Line exclusively), double from Suminoe to Wakayamashi

Service types Nankai and Kintetsu are the only two private railway operators in Kansai that offer charged Limited Express trains.

Limited express trains named "Southern" are operated between Namba and Wakayamashi or Wakayamakō. They are operated with 8-car formations and 4 cars of 8 are charged for seat reservation. Trains to and from Wakayamakō connect to Nankai Ferry services to and from the Shikoku region.

Airport limited express trains named "rapi:t" are operated between Namba and Kansai Airport and exclusively with 50000 series 6-car formations. All cars are charged for seat reservation. rapi:t α trains stop at only stations marked with S, and rapi:t β trains at stations marked with S and S*. They have been operated since Kansai International Airport opened in 1994.

Express trains are operated between Namba and Wakayamashi or Wakayamakō before 10 a.m. and after 4 p.m. on weekdays and in morning on Saturdays, Sundays, Holidays, and pass Haruki Station. They are operated with 6 or 8-car formations. The fourth car of 8-car trains for Namba is only for women in the morning until arriving at Tengachaya by 8:30 a.m. on weekdays. Before November 26, 2005, operated all day, two per hour from 10 a.m. to 4 p.m.

Airport express trains are operated between Namba and Kansai Airport all day and stop at Haruki. 4 trains are operated per direction per hour from 10 a.m. until 4 pm. They are operated with 6 or 8-car formations. The fourth car of 8-car trains for Namba is only for women in the morning until arriving at Tengachaya by 8:30 a.m. on weekdays.

Sub express trains are operated between Namba and Hagurazaki, Misakikoen or Wakayamashi in the morning, evening, and night. They stop at airport express stations between Namba and Izumisano, and every station between Izumisano and Wakayamashi. Namba-bound trains are operated every morning and weekday rush hours in the evening.

Semi-express trains are operated from Hagurazaki or Haruki to Namba only on weekday mornings.

Local trains are operated between Namba and Wakayamashi all day. They also return to Namba at Hagurazaki, Tarui, Misakikōen or Kansai Airport in the rush hours and midnight. Only 1 northbound train is operated from Wakayamashi to Hagurazaki in the midnight. Trains pass Imamiyaebisu and Haginochaya stations due to absence of platforms on the tracks of the Nankai Line. Those stations are served by local trains of the Kōya Line. In Japanese railway operation, "Futsū" (literally "ordinary, normal") and "Kakueki Teisha" (literally "train that stops at every station", "Kakutei" for short) are used interchangeably for trains that stop at every station. On the Nankai Railway alone, however, the two words are used for different classes of train. The former is for Locals of Nankai Main Line that do not stop at the above two stations, while the latter is for Kōya Line trains that do stop there, true to the meaning of the Japanese name of the service class.

Stations Main Line ● : Trains stop. ▲: Rapi:t α trains pass, β trains stop. ▼: At Haruki, Express trains marked with a white line makes a stop ◆: Trains stop in the off-peak hours from January 1 until 3 every year. ｜ ↑: All trains pass (Arrows indicate directions) Wakayamadaigakumae became one of the Southern stations on October 18, 2014.

Number Station Japanese Distance (km) Local Semi-Express Sub-Express Airport Express Express Ltd. Exp. SouthernLtd. Exp. Rapi:t Transfers LocationNK01 難波 0.0●●●●●●● Chūō-ku, Osaka Osaka PrefectureNK02 今宮戎 0.9｜↑｜｜｜｜｜ Naniwa-ku, OsakaNK03 新今宮 1.5●●●●●●● Nishinari-ku, OsakaNK04 萩ノ茶屋 2.0｜↑｜｜｜｜｜NK05 天下茶屋 3.0●●●●●●● NK06 岸里玉出 3.9●↑｜｜｜｜｜ NK07 粉浜 5.1●↑｜｜｜｜｜ Sumiyoshi-ku, OsakaNK08 住吉大社 5.7●↑◆◆｜｜｜ NK09 住ノ江 6.7●↑｜｜｜｜｜ Suminoe-ku, OsakaNK10 七道 8.2●↑｜｜｜｜｜ Sakai-ku, SakaiNK11 堺 9.8●●●●●●▲NK12 湊 11.2●●｜｜｜｜｜NK13 石津川 12.7●●｜｜｜｜｜ Nishi-ku, SakaiNK14 諏訪ノ森 13.8●●｜｜｜｜｜NK15 浜寺公園 14.8●●｜｜｜｜｜ NK16 羽衣 15.5●●●●●｜｜ TakaishiNK17 高石 17.4●●｜｜｜｜｜NK18 北助松 18.5●●｜｜｜｜｜ IzumiōtsuNK19 松ノ浜 19.5●●｜｜｜｜｜NK20 泉大津 20.4●●●●●｜｜NK21 忠岡 22.3●●｜｜｜｜｜ TadaokaNK22 春木 23.7●●●●▼｜｜ KishiwadaNK23 和泉大宮 25.0●●｜｜｜｜｜NK24 岸和田 26.0●●●●●●▲NK25 蛸地蔵 26.9●●｜｜｜｜｜NK26 貝塚 28.6●●●●●｜｜ KaizukaNK27 二色浜 30.4●●｜｜｜｜｜NK28 鶴原 31.3●●｜｜｜｜｜ IzumisanoNK29 井原里 32.4●●｜｜｜｜｜NK30 泉佐野 34.0●●●●●●● Through service:From Izumisano: Local / Airport Express / Limited Express Rapi:t to Nankai Airport Line for Kansai AirportNK33 羽倉崎 36.1●●●｜｜IzumisanoOsaka PrefectureNK34 吉見ノ里 37.4●●｜｜ TajiriNK35 岡田浦 38.8●●｜｜SennanNK36 樽井 40.6●●｜｜NK37 尾崎 43.1●●●●HannanNK38 鳥取ノ荘 44.6●●｜｜NK39 箱作 46.6●●｜｜NK40 淡輪 50.2●●｜｜MisakiNK41 みさき公園 51.9●●●●NK42 孝子 56.3●●｜｜NK43(Fujitodai) 和歌山大学前 （ふじと台） 58.0●●●●WakayamaWakayama PrefectureNK44 紀ノ川 61.6●●｜｜ NK45 和歌山市 64.2●●●●Through service:From Wakayamashi: Express (weekdays only) / Limited Express Southern to Wakayamako Line for Wakayamako

Tennoji Branch Line Listed counterclockwise: All stations are in the city of Osaka, Osaka Prefecture. Station Japanese Closed Location 天下茶屋 18 November 1984 Nishinari-ku, Osaka 曳舟 1949 今池町 1 April 1993 大門通 1949 飛田本通 1 April 1993 天王寺 Tennōji-ku, Osaka

Rolling stock

9000 series exclusively for Southern (non-reserved car) 8300 series (from Autumn 2015) exclusively for Southern (non-reserved car, from December 2020) 8000 series exclusively for Southern (non-reserved car) 7100 series exclusively for Southern (non-reserved car) 7000 series (until October 2015) 2000 series 1000 series 10000 series exclusively for Southern (reserved car) 12000 series exclusively for Southern (reserved car) 50000 series exclusively for rapi:t 3000 series Semboku 5000 series Semboku 7000 series Semboku 7020 series

History One of the oldest private railway lines still existing, the gauge Namba - Yamatogawa (since closed) section was opened in 1885 by (separate from the present-day Hankai Tramway).The Industrial Railway Record - February 1970 - A Japanese Private Railway The line was extended to Sakai in 1888, and the Namba - Sumiyoshitaisha section was duplicated in 1892.

In 1897 the then separate Nankai Railway opened the Sakai - Sano (present-day Izumisano) section as 1067mm gauge, with the Namba - Sano section regauged to match, and the Sumiyoshitaisha - Sano section duplicated the same year. The following year the Hankai Co. merged with Nankai Railway, and the line was extended to Wakayama. The present line to Wakayamashi was completed in 1903, and in 1906 the first dining car on a private railway in Japan was introduced on the Wakayama express.

The duplication of the line extended to Hamaderakōen in 1907, Kaizuka in 1911, Takako in 1915 and was completed to Wakayama in 1922.

Electrification at 600 VDC began in 1907 on the section from Namba to Hamaderakōen, and was completed in 1911. The voltage was increased to 1500 VDC in 1973.

Works to elevate long sections of the line began with the short downtown section including Imamiyaebisu station in the 1930s and continued from the 1970s until the 2020s. The first 18 km until past Takaishi station will be completely elevated by 2028, and three shorter isolated sections further down the line have also been elevated. Completion of the various stages: 1938: Imamiyaebisu 1980: Namba (terminus), Kohama - Sumiyoshitaisha - Suminoe 1985: Shichidō - Sakai - Minato - Ishizugawa 1993: Tengachaya - Kishinosato-Tamade 1994: Kishiwada 2008: Matsunohama, Izumisano 2012: Izumiōtsu 2021: Hagoromo - Takaishi 2024: Tennoji Branch Line 2028: Suwanomori - Hamaderakōen

Former connecting lines Tengachaya station - A 2 km line to Tennoji opened in 1900. In 1933 the line was electrified at 1500 VDC, the line closing in 1984. Sakai station - A 2 km 1435mm gauge line from Shukuin to Ohama, electrified at 600 VDC, opened by the BanSakai Electric Railway Co. in 1912 (and acquired by Nankai in 1914) connected at this station until closed in 1949. Wakayama station - A 3 km line to Higashi-Matsue on the Nankai Kada Line opened in 1912. The line was electrified at 600 VDC in 1930, and closed in 1955.

References This article incorporates material from the corresponding article in the Japanese Wikipedia