A Retired Seabourn Ship Can Now Sail Where Rivals Cannot

Mitsui O.S.K. Cruises unveiled Mitsui Ocean Sakura to the media at Yokohama’s Shinko Pier cruise terminal on 16 September, and the ship entered service on 19 September with a four-night round trip from Yokohama. She is the former Seabourn Sojourn, sold by Carnival Corporation to the Japanese shipping group MOL in February 2025, and she is the second vessel in the Mitsui Ocean Cruises brand after Mitsui Ocean Fuji, herself a former Seabourn ship. A fifteen-year-old luxury vessel getting a second life under a new flag is not unusual; what happens next with this one is.

The flag is the story. Mitsui Ocean Fuji is registered in the Bahamas, as almost every cruise ship is, for the familiar reasons of tax, crewing rules and regulatory convenience. Mitsui Ocean Sakura is registered in Japan. That single administrative fact lets her operate cruises entirely within Japanese waters, calling at Japanese ports in sequence without the foreign-port stop that cabotage rules otherwise require. For a domestic Japanese cruise market that has been growing steadily, it removes the awkward detour to Busan or Keelung that has shaped itineraries for years.

Her size helps as much as her paperwork. At roughly 32,000 gross tons and under 200 metres, she is small by modern standards, which is what allows her to call not only at the major urban ports but at smaller harbours across Okinawa and Hokkaido that a 150,000-ton ship simply cannot enter. The combination of a Japanese flag and a genuinely small hull is unusual, and it opens up a style of itinerary, remote island hopping within a single country, that the large international lines are structurally unable to offer in this market.

For international travellers the practical question is whether these sailings are sold outside Japan and in what language they are operated. Domestic-market Japanese cruises typically run in Japanese with limited English support, and pricing and booking channels often sit outside the usual international distribution. If you are drawn to the idea of a small ship threading the Okinawan islands or the Hokkaido coast, it is worth approaching through a specialist agent rather than assuming the itinerary will appear on the booking sites you normally use.

Sources: CruiseMapper, TRAICY Global