Tail record, Cessna Citation CJ4, Japan register
110 tracked flights in the 12 months to 31 Oct 2026, on about 5 days a month and an estimated 120 hours in the air.
01
110 tracked flights in the twelve months to 31 Oct 2026.
Tracked flights
110
in the twelve months, about 9 a month
Days flown a month
4.8
in the months it flew
Estimated hours
≈120
in the twelve months, from time in the air
02
Its busiest month was June 2026, with 16 flights.
Its busiest month was June 2026, with 16 flights, and its quietest May 2026, with 4. The record has 41 tracking gaps, so about one flight in 3 may be missing and every count is a minimum.
03
Each measure against all 439 tracked Citation CJ4s. The shaded band is the middle half; the gold dot is JA01KJ.
Chapter 4
Not graded
How hard has it been used?
Not compared: no percentile for this aircraft yet.
Flights a monthLead measure. Not compared: no percentile for this aircraft yet.
4.4Not compared
Days flown a monthNot compared: no percentile for this aircraft yet.
3.5 dNot compared
Estimated hours a yearNot compared: no percentile for this aircraft yet.
≈58 hrNot compared
Harsher means harder on the aircraft than three quarters of Citation CJ4s; typical is the middle half. Percentiles compare this aircraft with every tracked Citation CJ4, over its record since 4 Nov 2024.
04
The fleet is shown, and whether JA01KJ sits inside its middle half. Its grades and values are in the full report.
Chapter 1
Hours per landing, middle Citation CJ4: 1.3 : 1
Also graded: short hops. Leg length is shown as context.
Not graded: not enough data.
Unlock this chapterChapter 2
Salt air, middle Citation CJ4: 0%
Also graded: damp air, freeze–thaw, near the coast and moisture in the air.
Not graded: not enough data.
Unlock this chapterChapter 3
Short runways, middle Citation CJ4: 2%
Also graded: hot, high takeoffs; density altitude; dust and dry climate.
Not graded: not enough data.
Unlock this chapter05
All four chapters, every flight since January 2025 leg by leg, and the one thing to ask the seller.
Page one
Every chapter has this table, with a note on any assumption behind it.
days
Ask for
JA01KJ, Cessna Citation CJ4
$395one aircraft
Weighing it against other Citation CJ4s? Put it on a Spotlight board with up to four others. Included with Unlimited, $995 a month.
06
The Aircraft Ledger. “JA01KJ: how this Cessna Citation CJ4 is flown.” Data through 31 Oct 2026. theaircraftledger.com/aircraft/ja01kj
About 120 estimated hours in the 12 months to 31 Oct 2026, across 110 tracked flights. Hours are estimated from time in the air, so the logbook has the exact figure.
JA01KJ made 110 tracked flights in the 12 months to 31 Oct 2026, about 9 a month, and flew on about 5 days in each month it flew.
None of its 110 tracked flights in the 12 months to 31 Oct 2026 crossed a border.
It was last tracked in October 2026. We publish an aircraft’s flights seven days after they happen, and show them by month only.
We leave out airports, bases and exact dates on purpose. We show how an aircraft has been used, not where it goes.
All four graded chapters (Fatigue, Corrosion, Engines and brakes, and Utilization), each against the tracked Citation CJ4s, plus the operational summary and operating rhythm, as a PDF, CSV and share link. It costs $395, or $995 a month for unlimited reports and Spotlight.
Method: flight data, every count a minimum. Estimated hours from time in the air. About our data
Owners and operators can ask us not to publish an aircraft. Data policy and opt-out
Not a substitute for a pre-purchase inspection or records review. TailCheck shows how an aircraft has been used, not its condition.