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Military Airport
RestrictedThis is a Japan Air Self-Defense Force (JASDF) installation. Civil access is not permitted.
Access Notes:
JASDF bases closed to civil traffic
Current Weather
Raw METAR
Clouds - Visual Profile
Weather Briefing
MVFRIruma Air Base is currently reporting marginal VFR (MVFR) conditions with overcast skies at 1,100 feet.
Wind Analysis
Winds are from the north (10°) at 15 knots. Runway 35 is favored with a 14-knot headwind and 5-knot crosswind component. Student pilots and low-time aviators should exercise caution.
Visibility & Ceiling
The ceiling is 1100 feet AGL (overcast), placing conditions in the MVFR category.
Temperature & Moisture
Temperature is 17°C (63°F) with a dewpoint of 16°C. The temperature-dewpoint spread is very narrow, indicating saturated or near-saturated air. Fog formation or low cloud development is likely.
Forecast Outlook
The TAF forecast covers the next 30 hours. The forecast shows a transition between VFR and IFR conditions. Pilots should monitor the forecast closely and have an alternate airport plan. Expected weather includes: Rain, Mist, Heavy Rain, Mist, Light Rain. Winds are forecast to reach up to 40 knots during the period. Expect variable wind speeds ranging from 6 to 40 knots. Temporary LIFR conditions are forecast with Heavy Rain, Mist between 23:00Z and 00:00Z. Temporary IFR conditions are forecast with Rain, Mist between 00:00Z and 04:00Z. Temporary VFR conditions are forecast between 05:00Z and 08:00Z.
Pilot Recommendations
VFR pilots should exercise caution. Consider filing IFR if instrument rated, or postponing the flight if conditions are expected to deteriorate further. The narrow temperature-dewpoint spread creates risk of fog formation, particularly during evening and early morning hours. The forecast indicates conditions may deteriorate. Ensure you have fuel reserves and a viable alternate airport.
This briefing is generated from real-time METAR and TAF data. Always verify with official sources before flight.
Forecast (TAF)
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Airport Runway Layout
Runway Information
| Runway | Length | Width | Surface | Heading | Wind Component |
|---|---|---|---|---|---|
|
✈️ 17/35
Active: 35
|
6,562 ft | 148 ft | ASP | 159° |
↑ 14.1 kt
•
↔ 5.1 kt
20° angle
|
Iruma Air Base - Airport Information
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About Iruma Air Base
Iruma Air Base is a military facility. Civilian access may be restricted or require Prior Permission (PPR). Pilots should consult the JP AIP for current access procedures and restrictions.
Overview
Iruma Air Base (RJTJ) is a medium-sized airport located in Sayama, Japan, situated at an elevation of 295 feet above mean sea level. The base serves the Greater Tokyo metropolitan area, positioned strategically in the Saitama Prefecture. Its single runway (17/35) extends 6,562 feet and is constructed with asphalt surface.
Flying Conditions
The airport's moderate elevation and location near Tokyo suggest variable weather conditions influenced by regional maritime and continental air masses. Pilots should anticipate potential seasonal wind variations that could impact runway 17/35 operations. The surrounding terrain and proximity to urban areas may create localized wind patterns that require careful approach and departure planning.
Notable Features
Iruma Air Base's runway orientation of 17/35 indicates a north-northwest to south-southeast alignment. The airport's geographic position near Tokyo provides accessibility to a significant metropolitan region. The 6,562-foot runway length accommodates a range of medium-sized aircraft operations with sufficient runway distance for most standard approach and landing requirements.
Approach Considerations
Approach considerations should focus on the runway's 17/35 orientation, which suggests potential crosswind scenarios depending on prevailing meteorological conditions. Pilots should carefully assess wind direction and speed when selecting runway approach. The airport's elevation at 295 feet MSL provides relatively straightforward terrain clearance for standard approach procedures.
Data Sources & Accuracy: Airport information sourced from OurAirports.com, a collaborative database of worldwide airport data. Weather data from official aviation weather services including NOAA Aviation Weather Center and international METAR/TAF providers. Information is updated regularly but pilots should always verify current conditions and NOTAMs through official channels before flight operations.
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Official Data Sources
Disclaimer: Data is provided for informational purposes only. Pilots must verify all information through official sources before flight operations. Weather conditions change rapidly; always obtain a current briefing from approved weather services.