Kushiro Shitsugen (Kushiro marsh=釧路湿原) is national park and has the largest marsh wetland in Japan. It is well known as the home of endangered Japanese Cranes (丹頂鶴). JR Hokkaido’s Senmo line goes through this wetland and gives you a great scenery. Kushiro Shitsugen Norokko train (釧路湿原ノロッコ号) is operated on this line from late April to …