MS Asuka II (飛鳥II) is a cruise ship owned and operated by Nippon Yusen Kaisha.

During Crystal Harmony's maiden voyage in the South American and Caribbean waters, the ship caught on fire due to a fuel leak in an auxiliary engine room some 200 miles (320 km) from Cristóbal.

Crystal Harmony drifted without power for sixteen hours but after repairs made it to port under her own steam and disembarked her passengers in Panama.

She was transferred to the parent company Nippon Yusen Kaisha to replace the Asuka.

[7][8] On 30 April 2021, the ship was en route from the Port of Yokohama and was scheduled to stop at Aomori and Hokkaido prefectures when one case of COVID-19 was detected on board.