Map of Iruma, Japan

Iruma is a city in Saitama, Japan, with a population of about 147,166. It lies at 35.8180°N, 139.3680°E. Iruma is about 33 km (20 mi) northwest of Tokyo, the capital. The nearest city on our map is Sayama, 6 km to the northeast.

Iruma at a glance

Where is Iruma?

• The 13th largest city in Saitama on this site.
• Located in the Northern and Eastern hemispheres.
• Daylight ranges from about 9 h 44 min on the shortest day to 14 h 35 min on the longest day (around 21 December and 21 June).

Cities near Iruma

• Sayama — 6 km northeast
• Hannō — 6 km northwest
• Higashiyamato — 9 km southeast
• Tokorozawa — 9 km east
• Fussa — 10 km southwest
• Musashimurayama — 10 km southeast
• Akishima — 11 km south
• Hidaka — 11 km north
• Higashimurayama — 11 km southeast
• Ōme — 12 km west

Largest cities in Saitama

• Saitama — 1,324,854
• Kawaguchi — 607,373
• Kawagoe — 354,571
• Koshigaya — 345,353
• Tokorozawa — 344,194
• Sōka — 249,645
• Kasukabe — 229,792
• Ageoshimo — 226,940
• Kumagaya — 195,277
• Niiza — 166,017

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.