Kushiro Shitsugen (Kushiro marsh) is national park and has the largest marsh wetland in Japan. It is well known as the home of endangered Japanese Cranes. JR Hokkaido’s Senmo line goes through this wetland and gives you a great scenery. Kushiro Shitsugen Norokko train is operated on this line from late April to late September. This is the easiest way to enjoy a day excursion in Kushiro Shitsugen from Kushiro. And Kushiro can be reached by Limited Express Super Ozora from Sapporo easily. Both Super Ozora and Kushiro Shitsugen Norokko train are fully covered by Japan Rail Pass.
When you go to southeastern Hokkaido, The limited express Super Ozora and the limited express Super Tokachi take you there. Super Ozora connects Sapporo and Kushiro. Super Tokachi connects Sapporo and Obihiro. These trains are very popular and the reserved seats are sold out often.
Both trains are fully covered by JR Pass and Hokkaido Rail Pass. If you have a plan to take these trains, I strongly recommend you to reserve your seat.
I would like to share the information about these trains information and the timetable.