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One hundred and fifty years after the opening of the port of Yokohama, the city is putting on the "Y+150" exposition, a series of events from 18 April to 29 Sept, 2009. -- Rick Cogley

From the site: Theme Events Celebrating the 150th Anniversary of the Opening of the Port of Yokohama
A Grand Exposition for Yokohama’s 150th Year

Experience 150 years of Yokohama at our grand exposition celebrating the past and the future. A full program of events will be held to celebrate the 150th anniversary of the 1859 opening of the Port, based on three themes that are the lifeblood of Yokohama − the sea, the city and nature.

yokohama 150th y+150 perry