At 8,800 gross tons, Blue Happiness is the 37,712th 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 1.5 times the typical vessel on record here. The largest measures 499,167 GT.
Among the 1,234 ferrys held here, it ranks 309th by tonnage — larger than 65% of that group. Their median tonnage is 3,908 GT, and the largest tenth begin at 25,454 GT. The flag most often flown by this group is Japan (241 ships). The yard that appears most often against it is Mitsubishi Heavy Industries, with 34 hulls on record.
Japan is the country of registry for 2,663 vessels in this directory, of which Blue Happiness is the 481st 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 241 ferrys flying the Japan flag, of which 95 are larger by tonnage.
Blue Happiness was built in 2017, making it 9 years old. It is one of 1,468 hulls in this registry delivered that year, a cohort whose median tonnage is 26,213 GT; within it this ship is the 964th largest. Across the whole of the 2010s the registry holds 20,111 vessels, median 23,456 GT. The median build year across the entire registry is 1995.
The registry attributes 48 vessels to Naikai Zosen Corporation, with a median tonnage of 8,848 GT, delivered between 1971 and 2025. See the rest of that yard’s output.
At 144.0 m overall, Blue Happiness is 40.0 m longer than the 104.0 m median for ferrys on record.
IMO numbers are issued in broadly chronological blocks. Within 500 either side of 9773820 this registry holds 46 other vessels, whose median build year is 2016 and which range from 2015 to 2020. That places this hull’s registration in the same part of the series, consistent with its recorded build year of 2017.
Its IMO number, 9773820, carries its own check digit. The first six digits are weighted seven down to two and summed — 9×7 + 7×6 + 7×5 + 3×4 + 8×3 + 2×2 = 180 — and the last digit of that total, 0, must equal the seventh digit, 0. It does, so this number is well formed.
