At 1,380 gross tons, Ryofu Maru is the 62,597th largest of the 84,014 vessels in this registry that report a tonnage. The median across that set is 5,994 GT, so this hull is about 4.3 times smaller than the typical vessel on record here. The largest measures 499,167 GT.
Among the 58,086 vessels this registry holds no type classification for held here, it ranks 35,331st by tonnage — larger than 29% of that group. Their median tonnage is 5,358 GT, and the largest tenth begin at 54,309 GT. The flag most often flown by this group is Panama (5,698 ships). The yard that appears most often against it is HD Hyundai Mipo, with 615 hulls on record.
Japan is the country of registry for 2,663 vessels in this directory, of which Ryofu Maru is the 1,021st largest by tonnage. 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 1,534 vessels this registry holds no type classification for flying the Japan flag, of which 470 are larger by tonnage.
Ryofu Maru was built in 1994, making it 32 years old. It is one of 1,047 hulls in this registry delivered that year, a cohort whose median tonnage is 5,680 GT; within it this ship is the 749th largest. Across the whole of the 1990s the registry holds 12,006 vessels, median 4,956 GT. The median build year across the entire registry is 1995.
The registry attributes 253 vessels to Japan Marine United Corporation, with a median tonnage of 43,291 GT, delivered between 1954 and 2024. See the rest of that yard’s output.
At 80.0 m overall, Ryofu Maru is 35.0 m shorter than the 115.0 m median for vessels this registry holds no type classification for on record.
IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9100322 this registry holds 51 other vessels, whose median build year is 1994 and which range from 1993 to 2007. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 1994.
Its IMO number, 9100322, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 + 1×6 + 0×5 + 0×4 + 3×3 + 2×2 = 82 — and the last digit of that total, 2, must equal the seventh digit, 2. It does, so this number is well formed.
