In Japan, there is now growing public concerns to the frozen ground. This is because that Japanese government proposed frozen soil wall as one of the effective ways to protect diffusion of contaminated water from Fukushima Daiichi Nuclear Power Station damaged by 2011 Tohoku earthquake and tsunami. For public enlightenment, the Subcommittee on Ground Freezing of the Japanese Society of Snow and Ice has published special document dealt with basic of frozen ground and its engineering applications.

The open-access database for historical domestic ground temperature and frost depth data in Japan has digitized data from 14 Japan Meteorological Agency stations, which are going to make open in spring 2015 (K. Saito, T. Sueyoshi of National Institute of Polar Research, K. Watanabe of Mie University and K Takeda of Obihiro University of Agriculture and Veterinary Medicine).

For stage 1 of the terrestrial research sub-project (GRENE-TEA) model intercomparison project (GTMIP) in the GRENE Arctic Climate Change Research Project, model driving data that assimilates the observation data from four sites (Fairbanks, Yakutsk, Tiksi, Kevo) are produced and made open for participants (K. Saito and S. Miyazaki of NIPR). Submission of the model outputs in November 2014, and the analysis results will be presented at ISAR-4 in Toyama, Japan, April 2015.

A. Ikeda (University of Tsukuba) and G. Iwahana (UAF) has maintained the 10 m-deep borehole on the summit of Mt. Fuji. The borehole temperatures were successfully monitored since the summer of 2011.

In Alaska, K. Harada (Miyagi University), K. Narita (Akita University) and K. Saito (JAMSTEC) have carried out researches at the Kougarok site near Nome since 2005 in order to monitor permafrost conditions after severe wildfires. K. Harada also has been conducting the project named 'Frost tube in Japan' since November 2011, under the collaboration with the project of 'Permafrost Outreach Programs' by K. Yoshikawa (WERC, INE, UAF). Frost tubes were set at 19 schools in Hokkaido area, Japan, frost depth measurement will be done by school children and teachers.

In eastern Siberia, long-term permafrost monitoring at Tiksi was conducted by Y. Iijima, H. Park, and H. Yabuki (JAMSTEC) with Russian colleague A. N. Fedorov (Permafrost Institute, Russia). Measurements of vegetation and topography change at 1x1 km CALM grid revealed increases in thermokarst depression and ponding at polygonal tundra. Regional changes in active layer thickness were measured in mid-September at monitoring sites of Spasskaya-pad, Yukechi and Churapcha (newly set up) in central Yakutia.

Report prepared by M.Ishikawa ( mishi@ees.hokudai.ac.jp)