There are 5 cruises departing from Seoul which you can book.
Cruise lines offering departures from Seoul include Celebrity.
12 Night South Korea To Japan Cruise
Ship: Celebrity Millennium
Nights: 12
Itinerary: Seoul (incheon), Jeju Island, Nagasaki, Kagoshima, Hiroshima, Kochi, Kyoto (osaka), Kyoto (osaka), Mt Fuji (shimizu), Tokyo (yokohama)
Single
$5,684 pp
Twin
$2,379 pp
Triple
$2,439 pp
Quad
$2,139 pp
12 Night Best Of Japan & South Korea
Ship: Celebrity Millennium
Nights: 12
Itinerary: Seoul (incheon), Jeju Island, Nagasaki, Kagoshima, Hiroshima, Kyoto (osaka), Kyoto (osaka), Mt Fuji (shimizu), Tokyo, Tokyo
Single
$35,256 pp
Twin
$4,062 pp
Triple
$3,018 pp
Quad
$2,495 pp
12 Night Best Of Japan & South Korea
Ship: Celebrity Millennium
Nights: 12
Itinerary: Seoul (incheon), Jeju Island, Kumamoto (yatsushiro), Kagoshima, Hiroshima, Kyoto (osaka), Kyoto (osaka), Mt Fuji (shimizu), Tokyo (yokohama), Tokyo (yokohama)
Single
$13,736 pp
Twin
$3,318 pp
Triple
$2,490 pp
Quad
$2,076 pp
13 Night Best Of Japan & South Korea
Ship: Celebrity Millennium
Nights: 13
Itinerary: Seoul (incheon), Jeju Island, Fukuoka, Nagasaki, Kagoshima, Hiroshima, Kochi, Kyoto (osaka), Kyoto (osaka), Mt Fuji (shimizu), Tokyo
Single
$4,421 pp
Twin
$2,147 pp
Triple
$1,963 pp
Quad
$1,787 pp
12 Night Best Of Japan & South Korea
Ship: Celebrity Millennium
Nights: 12
Itinerary: Seoul (incheon), Jeju Island, Nagasaki, Kagoshima, Hiroshima, Kochi, Kyoto (osaka), Kyoto (osaka), Mt Fuji (shimizu), Tokyo
Single
$4,723 pp
Twin
$2,272 pp
Triple
$2,046 pp
Quad
$1,841 pp