Japan is the country of registry for 2,663 vessels in this directory. The most common class under that flag is vessels this registry holds no type classification for (1,534 ships), and the median vessel measures 764 GT. Browse every ship flagged Japan.
Narrowing to both dimensions at once, this registry holds 66 naval / patrols flying the Japan flag.
JCG Ryūkyū was built in 2000, making it 26 years old. It is one of 1,296 hulls in this registry delivered that year, a cohort whose median tonnage is 8,737 GT. Across the whole of the 2000s the registry holds 18,605 vessels, median 9,957 GT. The median build year across the entire registry is 1995.
The registry attributes 117 vessels to Mitsubishi Heavy Industries Nagasaki Shipyard & Machinery, with a median tonnage of 61,321 GT, delivered between 1955 and 2021. See the rest of that yard’s output.
IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9197167 this registry holds 76 other vessels, whose median build year is 2000 and which range from 1998 to 2005. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 2000.
Its IMO number, 9197167, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 + 1×6 + 9×5 + 7×4 + 1×3 + 6×2 = 157 — and the last digit of that total, 7, must equal the seventh digit, 7. It does, so this number is well formed.
