The room at the University of Tokyo that Prof. Ikeda was using at the time of his retirement is still being used as a professor's room. The oldest red brick wall building on the Hongo Campus (construction started in 1913 and completed in 1916), where the room is located and which is now designated as the Chemistry East Wing Bldg., was designed based on a basic concept developed by Prof. Ikeda. Thanks to the roof's being made of lead, as suggested by Prof. Ikeda, the building was able to endure the massive fires caused when the Great Kanto Earthquake occurred in 1923, and it still boasts its original appearance. In the last years of his life, Prof. Ikeda built a laboratory in the garden of his house and worked on various research subjects. I think that his scientific spirit, his constant curiosity about the universe, and his attempts to clarify the true nature of things resulted in the discovery of Umami.