Iwakuni Kintaikyo Airport / Marine Corps Air Station Iwakuni

RJOI / IWK

Iwakuni, JP

Last Updated
Mar 4, 10:56Z

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
Fresh 22 min ago
10:56Z

☀️ Day
VFR
Flight Rules
9°C
Temperature
Dewpoint: 0°C
8 kt
360°
10 SM
Visibility
Ceiling
Unlimited
1023 hPa
QNH
Altimeter Setting

Raw METAR

METAR RJOI 041056Z 36008KT 10SM FEW025 SCT050 09/00 A3020 RMK AO2 SLP226 T00890000 $

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 7 ft
FEW 2,500 ft AGL
SCT 5,000 ft AGL
🌤️
FEW
Few (1/8-2/8 sky coverage)
2,500 ft
AGL (Above Ground)
2,507 ft AMSL
SCT
Scattered (3/8-4/8 sky coverage)
5,000 ft
AGL (Above Ground)
5,007 ft AMSL
QNH
1023 hPa
Sea Level Pressure
For altitude above MSL
QFE
1023 hPa
Field Pressure
Height above aerodrome (7 ft)
Pressure Alt
-286 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: -1,004 ft
ISA Deviation: -6.0°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF RJOI 0405/0505 VRB06KT 9999 FEW025 SCT050 522105 QNH3011INS FM041000 04010KT 9999 FEW020 FEW045 522106 QNH3014INS FM041600 VRB05KT 9999 FEW020 522406 QNH3019INS FM042100 VRB05KT 9999 FEW025 SCT160 522603 QNH3021INS FM050300 VRB05KT 9999 FEW030 SCT160 500000 QNH3019INS T13/0406Z T04/0421Z
Upcoming Changes (Next 12 Hours)
11:17Z BASE
+0h
VFR VRB 6 kt
Visibility: 10+ km
16:00Z FM041600
+5h
VFR VRB 5 kt
Visibility: 10+ km
21:00Z FM042100
+10h
VFR VRB 5 kt
Visibility: 10+ km

24-Hour Weather Evolution

Loading weather data...
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
JOI
02 ✈️
20
02R ✈️
20L

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 02/20
Active: 02
8,000 ft 150 ft CON
7.5 kt 2.7 kt
20° angle
✈️ 02R/20L
Active: 02R
1,200 ft 150 ft CON
7.5 kt 2.7 kt
20° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - RJOI

4,180 observations | Sep 2025 - Mar 2026

Flight Rules Distribution

VFR
90.4%
MVFR
5.9%
IFR
3.1%
LIFR
0.6%

Iwakuni Kintaikyo Airport / Marine Corps Air Station Iwakuni enjoys predominantly VFR conditions, with visual flight rules prevailing 90.4% of the time. Prevailing winds are from the NW averaging 6.7 knots. Calm conditions occur 12.2% of the time. Temperature extremes range from -2°C to 32°C, reflecting significant seasonal variation. The best months for VFR flying are January, November, December.

Wind Analysis

Prevailing Direction: NW (315°)
Average Speed: 6.7 kt
Maximum Recorded: 29 kt
Calm Winds: 12.2%
Direction Distribution:
N
14.9%
NE
19%
E
5.3%
SE
4.4%
S
9.3%
SW
4.6%
W
4.8%
NW
25.3%

Temperature Range

Average: 13°C
Range: -2°C to 32°C
-2°C 32°C

Visibility

Average: 8 SM
Below 3 SM: 0.3%
Fog Frequency: 0.2%

Best Months for VFR

January November December

Runway Wind Analysis

Runway 02/20
Favorable wind: 100%
Avg crosswind: 3.2 kt
Runway 02R/20L
Favorable wind: 100%
Avg crosswind: 3.2 kt

Statistics computed from 4,180 METAR observations (Sep 2025 - Mar 2026). Data sourced from official aviation weather services. Updated daily.

Iwakuni Kintaikyo Airport / Marine Corps Air Station Iwakuni - Airport Information

Airport Details

ICAO Code: RJOI
IATA Code: IWK
Type: medium airport
Status: active
Elevation: 7 ft MSL

Location

City: Iwakuni
Country: JP
Latitude: 34.146333°
Longitude: 132.247238°
Time Zone: Etc/GMT-9

Runway Information

Runway 02/20
Length: 8,000 ft
Width: 150 ft
Surface: CON
ILS: No
Runway 02R/20L
Length: 1,200 ft
Width: 150 ft
Surface: CON
ILS: No

About Iwakuni Kintaikyo Airport / Marine Corps Air Station Iwakuni

Iwakuni Kintaikyo Airport / Marine Corps Air Station Iwakuni 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

Iwakuni Kintaikyo Airport serves as a joint civil-military airport located in Yamaguchi Prefecture, Japan, hosting both civilian traffic and Marine Corps Air Station operations. The airport sits at a low elevation of 7 feet MSL, providing relatively straightforward terrain for aircraft operations. Its two concrete runways offer substantial landing capacity, with the primary runway measuring 8,000 feet in length.

Flying Conditions

Weather conditions at Iwakuni are predominantly favorable for flight operations, with VFR conditions present 92.8% of the time. The airport experiences a moderate temperature range from -2°C to 32°C, with an average of 14.5°C. Prevailing winds from the northwest at an average of 6.3 knots create consistent and predictable wind conditions, with calm periods occurring 12.4% of the time.

Notable Features

The airport's dual runway configuration (02/20 and 02R/20L) provides operational flexibility and redundancy. Both runways demonstrate 100% favorable wind alignment and minimal average crosswind of 3.2 knots. Its coastal location near the Seto Inland Sea likely influences local meteorological patterns, though consistently high visibility averaging 10 statute miles supports reliable visual flight operations.

Approach Considerations

Pilots can expect excellent approach conditions, particularly during the peak VFR months of November, December, and January. The runways' alignment and low crosswind characteristics make both 02/20 and 02R/20L equally suitable for landing, with minimal wind-related approach challenges. The airport's low elevation and consistent weather patterns provide predictable and stable approach conditions for most aircraft types.

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.