Hokkaido University has long history of the research on crystallography. In 1936 Dr. Ukichiro Nakaya successfully produced the world's first "artificial snowflake crystal". Discovery of the mechanism of snowflake crystals brought him the Japan Academy Prize, and the university became a center of low-temperature science in Japan. The logo was designed by Dr. Cesar Pay Gómez to symbolize the past and the future, namely from the snow crystal to the quasicrystal. The famous phrase by Dr. Nakaya is "Snow, a letter from the sky.". One purpose of our conference is to find a proper ending to the phrase "Quasicrystals, a letter from ...?".