Map of Okaya, Japan

Okaya is a city in Nagano, Japan, with a population of about 54,286. It lies at 36.0566°N, 138.0451°E. Okaya is about 154 km (96 mi) west of Tokyo, the capital. The nearest city on our map is Suwa, 6 km to the east.

Okaya at a glance

Where is Okaya?

• The 11th largest city in Nagano on this site.
• Located in the Northern and Eastern hemispheres.
• Daylight ranges from about 9 h 42 min on the shortest day to 14 h 37 min on the longest day (around 21 December and 21 June).

Cities near Okaya

• Suwa — 6 km east
• Shiojiri — 9 km northwest
• Chino — 12 km southeast
• Matsumoto — 21 km north
• Ina — 27 km south
• Azumino — 29 km northwest
• Hotaka — 35 km northwest
• Hokuto — 40 km southeast
• Saku — 43 km northeast
• Ueda — 44 km northeast

Largest cities in Nagano

• Nagano — 372,760
• Matsumoto — 241,145
• Ueda — 157,480
• Iida — 101,536
• Saku — 99,131
• Azumino — 94,222
• Ina — 68,177
• Shiojiri — 67,241
• Chikuma — 59,381
• Chino — 56,400

Largest cities in Japan

• Tokyo — 9,733,276
• Yokohama — 3,777,491
• Osaka — 2,753,862
• Nagoya — 2,332,176
• Sapporo — 1,973,832
• Fukuoka — 1,612,392
• Kawasaki — 1,538,262
• Kobe — 1,525,152
• Kyoto — 1,463,723
• Saitama — 1,324,854

Map of Japan and all its cities →

Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.