Saiki (佐伯市, Saiki-shi) is a city located in Ōita Prefecture, Japan. As of 31 October 2023^[update], the city had an estimated population of 65,870 in 32921 households, and a population density of 73 persons per km². ^[1] The total area of the city is 903.11 km² (348.69 sq mi), making it the largest city by area in Kyushu.

Quick Facts 佐伯市, Country ...

Saiki 佐伯市
City
Motozaru Beach Saiki Castle Cape Tsurumisaki Utagenka Bridge Kohan Forest Park
Flag Seal
Location of Saiki in Ōita Prefecture
Saiki Location in Japan
Coordinates: 32°57′35″N 131°54′00″E
Country	Japan
Region	Kyushu
Prefecture	Ōita
Government
• Mayor	Toshiaki Tanaka
Area
• Total	903.11 km2 (348.69 sq mi)
Population  (October 31, 2023)
• Total	65,870
• Density	73/km2 (190/sq mi)
Time zone	UTC+09:00 (JST)
City hall address	1-1, Nakamura Minamimachi, Saiki-shi, Ōita-ken 876-8585
Climate	Cfa
Website	Official website
Symbols
Bird	Japanese white-eye
Fish	Sea: Aji River: Ayu
Flower	Yamazakura (Prunus jamasakura)
Tree	Oak

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Saiki is located in southeastern Ōita Prefecture, approximately 60 kilometers southeast of the prefectural capital at Ōita City. The eastern part faces the Bungo Channel and is within the borders of the Nippō Kaigan Quasi-National Park. It is noted for its ria coastal areas. The inland area of the city is mountainous and within the borders of the Sobo-Katamuki Quasi-National Park. The city is built on the largest alluvial plain in the prefecture, created by the Bansho River, a first-class river that flows through the city.

The area of Saiki was part of ancient Bungo Province. Saiki began in the early Edo period as the castle town of Saiki Domain and was ruled by the Mōri clan until the Meiji restoration. (This Mōri clan was not related to the more famous Mōri clan of Chōshū Domain.) Following the Meiji restoration, the town of Saeki within Minamiamabe District, Ōita was established on May 1, 1889 with the creation of the modern municipalities system. In July 1916, the name of the town was changed from "Saeki" to "Saiki" to reflect the local dialect, with the kanji of the name remaining the same. In February 1934, the Saeki Naval Air Corps of the Imperial Japanese Navy was established in Saiki to conduct air patrols to ensure the safety of the Bungo Channel, where warships sailing from Kure Naval District located in the Seto Inland Sea exited to the Pacific Ocean. In 1937, Saiki annexed the villages of Tsuruoka and Kamikata. On April 29, 1941 - Saiki Town merged with the villages of Yahata, Oirishima, and Nishikamiura to form the city of Saiki City. Due to its military significance, the city was bombed six times during World War II. In 1955, Saiki annexed the villages of Aoyama, Shimogata and Kidachi. On Saiki merged with the neighboring towns of f Kamae, Kamiura, Tsurumi, Ume and Yayoi, and the villages Honjō, Naokawa and Yonōzu (all from Minamiamabe District) to create the new and expanded Saiki City. Minamiamabe District was dissolved as a result of this merger.

Saiki has a mayor-council form of government with a directly elected mayor and a unicameral city council of 25 members. Saiki contributes three members to the Ōita Prefectural Assembly. In terms of national politics, the city is part of the Ōita 2nd district of the lower house of the Diet of Japan.

Saiki is a port city and a major regional commercial center.

Saiki has 21 public elementary schools and 12 public junior high schools operated by the city government. The city has two public high schools operated by the Ōita Prefectural Board of Education and one private high school. The prefecture operates one special education school for the handicapped.

• - Handan, China, friendship city since April 1994^[9]
• - Gladstone, Queensland, Australia, sister city since September 1996
• - Honolulu, Hawaii, USA, friendship city since December 2003

• Saiki Castle - A castle ruin, a National Historic Site and one of the Continued Top 100 Japanese Castles.^[10]
• Fukashima (深島) is one of Japan's cat islands.^[11][12]
• Saiki Chuo Hospital Stadium - During the 2002 World Cup, Saiki was the base camp for the Tunisia national football team.

• Nobuko Iwaki, politician
• Masatsugu Ono, author
• Riki Takeuchi, actor