Syowa Station is Japan's permanent Antarctic research station. It's quite large, consisting of several buildings that can accommodate up to 110 people with an overwintering crew of 30.
Syowa is supported by the icebreaker Shirase. The current version of this vessel was put into service in 2009. The cachet on the bottom left of the Shirase cover shows an image of a stone shrine honouring Shin Fukushima: was a Japanese Antarctic expedition member who died in October 1960.