KnowraHakodateLinked fromLinked fromThe 4 pages that link to Hakodate, each with the reason it gives.All 4Broader topic 3Related 1Convention of KanagawaBroader topic: It was the agreement’s second designated port, opening in 1855.Tsugaru StraitRelated: Its harbor has served as a major northern gateway across the waterway.Treaty of ShimodaBroader topic: The treaty opened Hakodate to Russian ships and consular presence.Oshima PeninsulaBroader topic: It is the peninsula’s largest city and a major gateway to southern Hokkaido.