Chogei () was a transportation ship belonging to the troops faithful to the Shogun during Japan's Boshin War.Chogei was originally built in England. After the end of the Boshin War she was used to transport the wounded rebels to Tokyo. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Mean Of Transportation