Exhibition in 1877 was incorporated into this as a wing. In April 1881, the museum was moved from the Home Ministry to the Ministry of Agriculture and Trade. It began construction on the associated zoo and added the Asakusa Bunko collection to the museum as its book department. A ceremony attended by Emperor Meiji opened the museum and zoo on 20 March 1882; the library was reopened on September 30. The facilities were open to the public every day except Mondays and two days around the New Year. In 1888 or 1889, the imperial household took over ownership of the museum, focusing its operations on cultural and scientific pursuits and ending its direct involvement with trade and industry. The original Honkan was severely damaged in the Great Kanto earthquake of 1923, and exhibits were moved to the undamaged Hyokeikan. The structure having originally been promoted as having "solidity... matched by no other" in Japan, its collapse led to disillusionment with the architecture and style it represented. Upon the marriage of Hirohito in 1924, the entire Ueno Parkalong with the museum and the zoowere returned to the Tokyo Municipal Government as a present. While the main building's reconstruction was being discussed, the natural science collections were removed from the museum in 1925 to form the separate Tokyo Museum of the Ministry of Education (the present-day National Science Museum). An Imperial Museum Innovation Promotion Committee was assembled the next year following the ascension of Hirohito as emperor, which ultimately decided to replace the former building. In 1931, they held a design contest and selected the Imperial-Crown plan from Jin Watanabe. The present Honkan was opened to the public in 1938, having reorganized its collection to dissolve the history department and classify its holdings as art. In November 1940, the Shosoin were publicly displayed for the first time to celebrate the supposed 2600th anniversary of the ascension of the first emperor of Japan. 400,000 came to see them during the 20-day exhibit. The museum saw attendance begin to fall after 1925; it was closed in 1945 during the final phases of the Second World War. It was placed under the Ministry of Education in 1947, the Independent Administrative Institution National Museum in 2001 (merging its administration with the Kyoto, Nara, andin 2005Kyushu National Museums), and the Independent Administrative Institution National Institutes for Cultural Heritage in 2007 (merging the IAINM's administration with the national