Sennan

History

The area of the modern city of Sennan was within ancient Izumi Province. Per the Kojiki and the Nihon Shoki, during Jimmu's Eastern Expedition to conquer the Yamato Basin, Jimmu and his brothers forces advanced up the Seto Inland Sea and landed near Naniwa. They faced stiff resistance from a local king named Nagamitsu-hiko and during the ensuing battle Itsuse no Mikoto was struck by an arrow. The area of Sennan is one of the locations which claim to be the site of this battle. Centuries later, it was the site of the Battle of Kashii, was the very first battle of the Summer Campaign of the 1615 Siege of Osaka. In the Edo Period, much of the city area was controlled by Kishiwada Domain, Yodo Domain or directly by the Tokugawa shogunate. The village of Tarui was established within Hine District with the creation of the modern municipalities system on April 1, 1889. On April 1, 1896 the area became part of Sennan District, Osaka. Tarui was promoted to town status on April 1, 1940. The town of Shindachi was created by the merger of the villages of Shindachi and Higashi-Shindachi on February 11, 1941. On September 30, 1956, the towns of Tarui and Shindachi merged with the villages of Onoshindachi, Shinge, Narutaki, and Nishishindachi to form the town of Sennan. On July 1, 1970 Sennan was promoted to city status. Sennan entered into discussions to merge with either Hannan and Misaki, or with Hannan, Misaki, Izumisano and Tajiri to form the city of "Sennanshu" (南泉州市) from 2001 to 2004; however, per a public referendum, only Misaki was in favor of the merger and the plans were abandoned.

Geography

Sennan is located in the southwestern part of Osaka prefecture. The northwest portion of the city is bordered by Osaka Bay and the southeastern portion borders the Izumi Mountains and Wakayama Prefecture. About one-third of the southern part of Kansai International Airport is within the borders of Sennan city, contributing to the city's economy, as well as the FedEx North Pacific Hub. *Osaka Prefecture **Hannan **Izumisano **Tajiri *Wakayama Prefecture **Iwade **Kinokawa

Most-observed species

• Eurasian Tree Sparrow

  Passer montanus (Linnaeus, 1758) · Aves
  346
• White Wagtail

  Motacilla alba Linnaeus, 1758 · Aves
  320
• Great Cormorant/European Shag

  Phalacrocorax carbo (Linnaeus, 1758) · Aves
  309
• Gray/Purple Heron

  Ardea cinerea Linnaeus, 1758 · Aves
  307
• Large-billed Crow

  Corvus macrorhynchos Wagler, 1827 · Aves
  254
• Brown-eared Bulbul

  Hypsipetes amaurotis (Temminck, 1830) · Aves
  247
• Rock Pigeon

  Columba livia J.F.Gmelin, 1789 · Aves
  243
• Blue Rock-Thrush

  Monticola solitarius (Linnaeus, 1758) · Aves
  218

Most recent

• M 5.7 — 2026-05-02
  12 km SSW of Kōya, Japan
• M 4.2 — 2026-03-25
  9 km NE of Akashi, Japan
• M 4.2 — 2025-03-06
  29 km WNW of Shingū, Japan
• M 4.4 — 2024-12-15
  9 km ESE of Yuasa, Japan
• M 4.4 — 2024-10-17
  9 km W of Kameoka, Japan
• M 4.4 — 2024-02-14
  0 km SSE of Kameoka, Japan