1. Laboratory of Applied Microbiology, Graduate School of Agriculture
2. Graduate School of Engineering
3. Center for Chronological Research, Nagoya University, Chikusa-ku, Aichi-ken, Japan
4. Institute of Low Temperature Science, Hokkaido University
5. Cold Regions Research and Engineering Laboratory, Fort Wainwright, Alaska
6. Hokkaido Study Center, University of the Air, Kita-ku, Hokkaido