| 1930 | School of Science is established with six departments: Mathematics, Physics, Chemistry, Geology and Mineralogy, Botany, Zoology. |
| 1949 | Departments of Botany and Zoology are combined as Department of Biology. |
| 1953 | Graduate School of Science (post-war educational system) is established with six departments: Mathematics, Physics, Chemistry, Geology and Mineralogy, Botany, and Zoology. Department of Geophysics is added in the School of Science. |
| 1959 | Department of Polymer Science is established. |
| 1963 | Department of Chemistry II is formed. |
| 1965 | Liquid Helium Center is established. |
| 1980 | School of Science celebrates the 50th anniversary. |
| 1981 | High Resolution Nuclear Magnetic Resonance Laboratory is established. |
| 1985 | Laboratory for Energy Dispersive and Wave Length Dispersive X-ray Fluorescence Spectroscopy is established (renamed the Earth and Planetary Solid Material Analytical Laboratory in 2015). |
| 1988 | Laboratory for SQUID Magnetometer and Susceptometer is established. |
| 1993 | Departments of Biology and Polymer Science are reorganized into Department of Biological Sciences. |
| 1994 | Department of Geology & Mineralogy and Department of Geophysics are reorganized into Department of Earth Sciences. |
| 1995 | Departments of Chemistry and Chemistry II are reorganized as Department of Chemistry. |
| 1998 | Institute of Seismology and Volcanology is established by combining 4 observatories, Research Center for Earthquake Prediction, and Laboratory for Ocean Bottom Observatory. |
| 2005 | School of Science celebrates the 75th anniversary. |
| 2006 | Graduate School of Science is reorganized to “Graduate School of Science” and “Faculty of Science”. Faculty of Science consists of five Departments: Mathematics, Physics, Chemistry, Biological Sciences, and Natural History Sciences (renamed Earth & Planetary Sciences in 2015). |
| 2007 | Nuclear Reaction Data Centre is established. Network Center for Molecular and System Life Sciences is established. Observation and Data Centre for Cosmosciences is established. |
| 2008 | Genome Dynamics Research Center is established. Center for Strategic Utilization of Elements is established. Moving into the current block of buildings (Bldg. 2-8). |
| 2010 | Alumnus and former faculty member Dr. Akira Suzuki, who is also a professor emeritus at our university, is awarded the Nobel Prize in Chemistry. |
| 2012 | Office for International Academic Support is established. |
| 2016 | Center for International Collaborative Education in Science is established. Mental Care Office, Office for Research Strategy, and Office for Promotion & Planning of Public Relations are set up. Office for the Education in Biomedical Science and Engineering and International Office for the Education in Science are established in the Center for International Collaborative Education in Science. Active Learning Promotion Office is moved to the Center for International Collaborative Education in Science. |
| 2017 | Promotion Office for Collaborative Mathematics Research and Education is established in the Center for International Collaborative Education in Science. |
| 2019 | Research Field of Hokkaido Weather Forecast and Technology Development (Hokkaido Weather Technology Center)(Endowed Research Field) is established in the Department of Earth and Planetary Sciences. Office for the Education in Chemical Science is established in the Center for International Collaborative Education in Science. The name of Office for Research Strategy is changed to Office for Education and Research Strategy. |
