Japan airport problem reports

Subject: RJTT runway threshold discrepancies (AIP vs OurAirports)

RJTT AIP data vs OurAirports values do not match numerically

From the RJTT AIP:

RWY 16L threshold

Lat: 35 deg 33' 57.23" N

Lon: 139 deg 47' 11.59" E

From OurAirports:

16L Base Threshold

Lat: 35 deg 33' 57.24" N (very close)

Lon: 139 deg 47' 13.21" E (~1.62 arcsec off, approx 40 m)

This longitude difference is too large to be explained by rounding.

Reciprocal runway (34R) also shows inconsistency

RJTT AIP gives:

RWY 34R threshold

Lat: 35 deg 32' 22.90" N

Lon: 139 deg 48' 18.49" E

OurAirports shows:

Reciprocal Threshold (DER)

Lat: 35 deg 32' 33" N (~10.1 arcsec, approx 310 m difference)

Lon: 139 deg 48' 10.78" E (~7.7 arcsec, approx 190 m difference)

These are not small deviations and suggest a systematic issue.

Overall assessment

RWY 16L:

Latitude matches closely

Longitude shows a significant offset (~40 m)

RWY 34R:

Both latitude and longitude show large positional differences (~200-300 m)

I updated all runway threshold and displacements based on more precise Bing maps and Google maps coordinates.

Line | Status | Source | le_ident | le_latitude_deg | le_longitude_deg | le_displaced_threshold_ft

-------|-----------|---------------|----------|------------------|------------------|---------------------------

32208 | Incorrect | Our Airports | 16L | 35.565899 | 139.787009 |

32208 | Correct | RJTT AIP | 16L | 35.56589722 | 139.78655278 | 1280

I updated all runway coordinates and displacements to the best of my knowledge. The coordinates cited from RJTT AIP define the runway endpoints but not the threshold.

I don't think the airport exists, or the location is incorrect.

Plan to reject this report, airport is "closed" because it no longer exists.

No detail of a problem.

no map airoport

Can not determine any problem

This airport has 'ident' equal to 'ZZZZ' in the database/CSV file which is a reserved ICAO code to identify an unknown airport, see [1].

I would suggest NOT to use ZZZZ

[1] https://en.wikipedia.org/wiki/List_of_airports_by_ICAO_code:_Z

https://en.wikipedia.org/wiki/List_of_airports_by_ICAO_code:_Z

Removed ZZZZ as OurAirports identifier and added Wikipedia link.

ident should be uppercase

fixed

I made a mistake, I put the threshold elevation in the displaced threshold, and now I can't modify it

Problem resolved.

Satellite data confirms an emergency heliport on top of the Clie Kawasaki building at 10-5 Ekimae Honch?, Kawasaki Ward, Kawasaki City.

Yakushima Airport has regular commercial service by Japan Airlines, contrary to the info saying it doesn't. (https://www.flightradar24.com/airport/kum/arrivals) (https://en.wikipedia.org/wiki/Yakushima_Airport)

Clicked "airline service" button. All done!

Existence is dubious, no proof of existence for at least the past 18 years according to satellite imagery. Google search yields no results.

Please refer to this website for more information on this Taisho-era flying field which may have been the first intentional aviation facility in Kyoto. https://airport1111.blog.ss-blog.jp/katsuragawa-gliderfield

The prefecture should be listed as Fukushima in order to be consistent with Hiroshima and Shimane (which use the same "shima" character).

spelling updated

Not enough details to address.

NOTAM

Not enough details to address.

Location confirmed correct.

Location confirmed correct.

Missing Prefecture (Hiroshima). My mistake.

Thanks for making the update, @animebirder

Change to heliport. No longer operates fixed-wing aircraft as of 2013. (North approach on Google Maps is clearly blocked by new buildings.)

Thank you to @animebirder for updating the airport data.