June 2 is the anniversary of opening the Yokohama Port. It's been 150 years since it was opened to the world and the modern Japan started. At that time there were only 100 families in Yokohama. After 150 years, the population became 3,660,000 which is the second largest in Japan after Tokyo 23 wards. About 42,500,000 tourists visit Yokohama every year.
Since this is the special anniversary year, there was the big memorial ceremony on May 31 at the Pacifico Yokohama. About 3,500 people including the Emperor, the Empress, the Prime Minister Taro Aso(麻生太郎), the US, Dutch, Russian, British, and French ambassadors to Japan attended.
The memorial event of Expo Y150 is open for 153 days from April 28 until Sep. 27. I hope to visit there someday.