Iruma Air Base

RJTJ

Sayama, JP

Last Updated
Jul 21, 03:55Z

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
Aging 1 hour ago
03:55Z

☀️ Day
VFR
Flight Rules
31°C
Temperature
Dewpoint: 25°C
8 kt
280°
10 SM
Visibility
12,000 ft
Ceiling
Above Ground Level
1010 hPa
QNH
Altimeter Setting

Raw METAR

METAR RJTY 210355Z 28008KT 10SM VCTS FEW030 SCT110 BKN120 31/25 A2982 RMK AO2A RAB10E20DZB20E23 TSE53 SLP096 P0000 T03140245

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 295 ft
FEW 3,000 ft AGL
SCT 11,000 ft AGL
BKN 12,000 ft AGL
🌤️
FEW
Few (1/8-2/8 sky coverage)
3,000 ft
AGL (Above Ground)
3,295 ft AMSL
SCT
Scattered (3/8-4/8 sky coverage)
11,000 ft
AGL (Above Ground)
11,295 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
12,000 ft
AGL (Above Ground)
12,295 ft AMSL

Weather Briefing

VFR

Iruma Air Base is currently reporting visual flight rules (VFR) conditions with broken clouds at 12,000 feet and 10 SM visibility. Note: This observation is 1.2 hours old and conditions may have changed.

Wind Analysis

Winds are from the west (280°) at 8 knots. Runway 35 is favored with a 3-knot headwind and 8-knot crosswind component.

Visibility & Ceiling

Visibility is 10 SM. The ceiling is 12000 feet AGL (broken), well above standard VFR minimums.

Temperature & Moisture

Temperature is 31°C (88°F) with a dewpoint of 25°C, indicating moderate moisture conditions. High temperatures at this elevation may result in significant density altitude effects. Pilots should calculate density altitude and adjust performance expectations accordingly.

Forecast Outlook

The TAF forecast covers the next 25 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 Thunderstorm Rain. Temporary MVFR conditions are forecast with Light Thunderstorm Rain between 02:00Z and 09:00Z.

Pilot Recommendations

Conditions are favorable for visual flight. 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
1010 hPa
Sea Level Pressure
For altitude above MSL
QFE
1000 hPa
Field Pressure
Height above aerodrome (295 ft)
Pressure Alt
393 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 2,384 ft (High - Reduced Performance)
ISA Deviation: +16.6°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF AMD RJTY 210220Z 2102/2203 09009KT 9999 SCT040 BKN100 QNH2978INS TEMPO 2102/2109 VRB15G25KT 8000 -TSRA SCT020 BKN040CB BECMG 2109/2110 20009KT 9999 SCT040 BKN100 QNH2979INS WND VRB06KT AFT 2113 BECMG 2200/2201 09009KT 9999 FEW020 SCT040 QNH2979INS TX37/2104Z TN27/2121Z
Upcoming Changes (Next 12 Hours)
05:08Z BASE
+0h
VFR 90° 9 kt
Visibility: 10+ km
Ceiling: 10,000 ft
09:00Z BECMG
+4h
IFR VRB 6 kt
Visibility: 2.113 km
Ceiling: 10,000 ft

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
Chart Features
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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: 35
6,562 ft 148 ft ASP 159°
2.7 kt 7.5 kt
70° 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.