Saikai Population 2026

Saikai has a population of 26,275, making it the #907 biggest city in 🇯🇵 Japan, located in Nagasaki. It is about 370× smaller than Tokyo, the country's biggest city.

Location of Saikai (capital Tokyo shown for reference). Boundaries: Natural Earth.

Population (city proper)

26,275

Rank in Japan

#907

Coordinates

32.98°N, 129.68°E

~184 m elevation · Asia/Tokyo

Distance to capital (Tokyo)

967 km

601 miles, straight line

Other big cities in Nagasaki

City	Population	Rank in Japan
Nagasaki	409,118	#48
Sasebo	243,223	#99
Isahaya	135,546	#193
Ōmura	95,397	#286
Obita	45,293	#604
Shimabara	43,338	#627
Minamishimabara	42,330	#644
Unzen	41,096	#659

Cities near Saikai

Sasebo243,223 people · ~21 km away
Togitsu30,084 people · ~23 km away
Ōmura95,397 people · ~26 km away
Obita45,293 people · ~27 km away
Arita19,010 people · ~30 km away
Nagasaki409,118 people · ~32 km away

FAQ

What is the population of Saikai?

Saikai has a population of 26,275 (city proper, latest official figure via GeoNames), making it the #907 biggest city in Japan.

What region is Saikai in?

Saikai is located in Nagasaki, Japan.

Is Saikai the capital of Japan?

No, the capital of Japan is Tokyo, about 967 km away.

Sources & notes

Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.

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