Tomamu – Obihiro segment will open on 22nd December.
Hokkaido was hit by very severe typhoon in late August. Many train lines are closed by this storm and many trains are suspended currently. Substitute bus service and tentative train are operated but trip time is much longer than original schedule. And also the accommodation of some trains are totally different from Limited Express train interior. It offers just commute train accommodation. It is obviously inconvenient. If you cannot accept this situation, I recommend you to change your trip plan. It may not be a right time to visit there.
When you go to South East part of Hokkaido, these trains take you there. Super Ozora and Super Tokachi are operated on same route. Super Ozora connect Sapporo and Kushiro. Super Tokachi connect Sapporo and Obihiro. These trains are very popular and the reserved seats are sold out very often. Especially JR Hokkaido give you a great service in Green car. Sometimes Green car is sold out earlier than Ordinary class. Both trains are fully covered by Japan Rail Pass. So if you have a plan to take these trains, I strongly recommend you to reserve your seat when you exchange your Japan Rail Pass.