Iruma Air Base
Daylight today(Jul 18, 2026, local time)
About 14h 19m of daylight. Civil twilight (dawn/dusk) approximates the FAA definition of night for logging and currency. Times are computed and approximate — verify with official sources.
About Iruma Air Base
Iruma Air Base is a Japan Air Self-Defense Force (JASDF) base located in the city of Sayama, Saitama Prefecture, north of western Tokyo, Japan.
Summary from Wikipedia, photo via Wikimedia Commons, licensed under CC BY-SA.
Live weather
RJTJLive departures & arrivals
Flight data by AeroDataBox. Times are estimates — not for navigation; confirm with the airline.
Where you can fly from here
Current scheduled routes & daily frequency by AeroDataBox. Approximate — confirm bookable schedules with the airline.
Map
Runway centrelines, navaids and overlapping airspace. Tiles © OpenStreetMap contributors. Reference only — not for navigation.
Runways (1)
| Runway | Length | Width | Surface | Lighting | Status |
|---|---|---|---|---|---|
| 17 / 35 | 6,562 ft / 2,000 m | 148 ft | Asp | Lighted | Open |
Radio frequencies (4)
| Type | Description | Frequency |
|---|---|---|
| APP | YOKOTA APP | 118.300 MHz |
| DEP | YOKOTA DEP | 122.100 MHz |
| GND | GND | 27.580 MHz |
| TWR | TWR | 126.200 MHz |
Navaids(1)
Airspace in this area(7)
| Name | Class | Type | Floor | Ceiling |
|---|---|---|---|---|
| IRUMA CTR | Class D | CTR | GND | 6000 ft MSL |
| YOKOTA RASA-2 | Class E | Controlled | 2000 ft MSL | 7500 ft MSL |
| TOKYO ACA-1 | Class E | Controlled | 8000 ft MSL | FL170 |
| TOKYO ACA-3 | Class E | Controlled | 700 ft MSL | FL240 |
| TOKYO ACA-18 | Class E | Controlled | 12000 ft MSL | FL240 |
| YOKOTA ACA-4 | Class E | Controlled | 700 ft MSL | 12000 ft MSL |
| YOKOTA ACA-6 | Class E | Controlled | 700 ft MSL | 8000 ft MSL |
Approximate bounding-box match from OpenAIP · all Japan airspace. Reference only — consult official charts for exact boundaries and status.
Tall obstacles nearby
| Obstacle | Height AGL | Top (MSL) | Lit |
|---|---|---|---|
| 防災行政無線子局 | 650 ft | 686 ft | — |
| Obstacle | 420 ft | 341 ft | — |
| プラウドタワー立川 | 390 ft | 341 ft | — |
| 所沢スカイライズタワー | 364 ft | 233 ft | — |
| Obstacle | 325 ft | 164 ft | — |
| フォーラスタワー所沢 | 318 ft | 220 ft | — |
| グラシスタワー所沢 | 312 ft | 253 ft | — |
| グレーシアタワーズ所沢 | 312 ft | 249 ft | — |
Tallest obstacles within ~10 nm. Data via OpenAIP. Reference only — consult official charts.
Nearby airports
Great-circle distance and true bearing from Iruma Air Base.
Frequently asked questions
What is the ICAO code for Iruma Air Base?
The ICAO code for Iruma Air Base is RJTJ.
Where is Iruma Air Base located?
Iruma Air Base is medium airport located in Sayama, Japan, at an elevation of 295 ft (90 m).
How many runways does Iruma Air Base have?
Iruma Air Base has 1 runway, the longest being 6,562 ft / 2,000 m.
What time zone is Iruma Air Base in?
Iruma Air Base is in the Asia/Tokyo time zone (UTC+09:00).
What is the magnetic variation at Iruma Air Base?
The magnetic variation (declination) at Iruma Air Base is approximately 8° W, per the World Magnetic Model. Variation changes slowly over time — always use the current value charted for navigation.
What airports are near Iruma Air Base?
The nearest airport to Iruma Air Base is Yokota Air Base (OKO), about 6.4 nm to the ssw, followed by Tachikawa Airfield and Honda Airport.
Is the information on this page suitable for flight planning?
No. Iruma Air Base data here is for reference and training only — not for navigation. Always consult official sources and current charts before any flight.