Iruma Air Base

RJTJ

Sayama, JP

Last Updated
Jul 4, 09:55Z

No METAR Available for RJTJ

Showing weather from nearby airport with METAR data.

Currently using: RJTY
Weather Source: Yokota Air Base (RJTY)
Distance: 6nm / 12km from RJTJ

Military Airport

Restricted

This is a Japan Air Self-Defense Force (JASDF) installation. Civil access is not permitted.

Access Notes:

JASDF bases closed to civil traffic

Consult official AIP (Japan AIP ENR 5.2) for current access procedures and restrictions.

Current Weather

Display Units
Recent 38 min ago
09:55Z

☀️ Day
MVFR
Flight Rules
24°C
Temperature
Dewpoint: 20°C
7 kt
140°
10 SM
Visibility
2,600 ft
Ceiling
Above Ground Level
1013 hPa
QNH
Altimeter Setting

Raw METAR

METAR RJTY 040955Z 14007KT 10SM SCT018 BKN026 24/20 A2992 RMK AO2A BKN V SCT SLP132 T02360201 $

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 295 ft
SCT 1,800 ft AGL
BKN 2,600 ft AGL
SCT
Scattered (3/8-4/8 sky coverage)
1,800 ft
AGL (Above Ground)
2,095 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
2,600 ft
AGL (Above Ground)
2,895 ft AMSL

Weather Briefing

MVFR

Iruma Air Base is currently reporting marginal VFR (MVFR) conditions with broken clouds at 2,600 feet and 10 SM visibility.

Wind Analysis

Winds are from the southeast (140°) at 7 knots. Runway 17/35 is favored with a 6-knot headwind and 4-knot crosswind component.

Visibility & Ceiling

Visibility is 10 SM. The ceiling is 2600 feet AGL (broken), placing conditions in the MVFR category.

Temperature & Moisture

Temperature is 24°C (75°F) with a dewpoint of 20°C. The narrow temperature-dewpoint spread suggests high humidity and potential for visibility restrictions, especially during cooling periods.

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: Light Showers Rain, Mist, Light Showers Rain. Temporary MVFR conditions are forecast between 06:00Z and 10:00Z.

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 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.

QNH
1013 hPa
Sea Level Pressure
For altitude above MSL
QFE
1003 hPa
Field Pressure
Height above aerodrome (295 ft)
Pressure Alt
303 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 1,454 ft
ISA Deviation: +9.6°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF RJTY 040500Z 0405/0511 18009KT 9999 SCT025 OVC200 QNH2991INS TEMPO 0406/0410 18010G15KT BKN025 BECMG 0415/0417 VRB06KT 6000 -SHRA BR BKN006 OVC013 QNH2987INS BECMG 0500/0501 15009KT 8000 -SHRA BKN020 OVC030 QNH2990INS TX26/0405Z TN20/0421Z
Upcoming Changes (Next 12 Hours)
10:33Z BASE
+0h
VFR 180° 9 kt
Visibility: 10+ km
Ceiling: 20,000 ft
15:00Z BECMG
+5h
IFR VRB 6 kt
Visibility: 6 km
Ceiling: 600 ft
Light Showers Rain, Mist

24-Hour Weather Evolution

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Data Sources
  • • Current conditions from METAR observations
  • • Historical data from past 24 hours
  • • No forecast or predicted data included
  • • Data updated with each new METAR report
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Note: Future values beyond current TAF validity are estimates based on climatological data and trends. Always verify with current forecasts before flight operations.

Airport Runway Layout

N
JTJ
17 ✈️
35

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 17/35
Active: 17
6,562 ft 148 ft ASP 159°
6.1 kt 3.5 kt
30° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Iruma Air Base - Airport Information

Airport Details

ICAO Code: RJTJ
Type: medium airport
Status: active
Elevation: 295 ft MSL

Location

City: Sayama
Country: JP
Latitude: 35.841900°
Longitude: 139.410995°
Time Zone: Europe/Moscow

Runway Information

Runway 17/35
Length: 6,562 ft
Width: 148 ft
Surface: ASP
ILS: No

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.

Official Data Sources

Weather NOAA Aviation Weather Center • International METAR/TAF Network
Airports OurAirports.com • Public domain airport database
NOTAMs FAA NOTAM System • ICAO NOTAM Distribution
Last updated: Jan 1, 1970 12:00 AM UTC

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.