The iconic Akamon Gate at the University of Tokyo is at risk of collapsing, according to seismic experts. The gate, which has stood for almost 200 years, has weakened to the point where it could crumble during a major earthquake or strong winds from a typhoon. As a result, the gate has been closed since February 2021 while a structural inspection takes place. The university plans to begin reinforcement work as soon as possible in order to reopen the gate.
The Akamon Gate, also known as a “goshudenmon,” is not only the oldest structure on campus but also an important cultural property. It was built in 1827 by Nariyasu Maeda, the lord of the Kaga domain, to welcome his new bride. Despite surviving various historical events such as the Kanto Great Earthquake and World War II air raids, it now faces potential collapse due to deterioration at its base and roof joints.
In response to a request from the Cultural Affairs Agency in 2018, which called for reinforcement of important cultural properties, the university commissioned an expert to visually inspect the gate. Although no extensive damage was found at its bases or joints during this inspection, it was determined that external forces from an earthquake or strong wind could cause it to collapse outward onto pedestrians.
One contributing factor is that the tiled roof’s construction method made it excessively heavy compared to other parts of the gate. To improve its earthquake resistance and reduce weight, plans are underway to reinforce column bases and decrease dirt usage for attaching tiles.
While there is currently no timetable for restoration and reopening due to prioritizing preservation without compromising aesthetic value, Professor Kaori Fujita expressed her desire for careful repairs so that future generations can enjoy this historic landmark.