I like the stained glass inside the ship.
The "Nippon Maru" in front of the Landmark Tower and the "Hikawa Maru" towering over Yamashita Park allow you to tour the inside of the ship.
Both ships have their own stained glass, and they really like to see pictures of ships on the ship. Of course, you can also enjoy seeing with your own eyes each guest room, kitchen, and social room that you can't believe is on the ship.
The photo shows Hikawa Maru in Yamashita Park.
It seems that Marine Tower also has a discount ticket for visiting Hikawa Maru, so why not go there?