There are two ways to get get to places in Iwate Prefecture. You can use Route 45 and take the scenic coastal road or you can go down the Hachinohe Expressway to the Tohoku Expressway. These instructions take you via the Expressway. You would be better off using this route to get to Morioka City, Nango, Kenji World, etc as well as some of the more popular ski slopes.
Exit the base from the POL gate and proceed straight about 3 KM until you reach the Momoishi Toll road. It is the first overpass you will come to.
Turn left at the traffic light just prior to the overpass and you are on the entrance ramp to the toll road. As you get on the bypass, set your trip counter.
You will pass through the Shimoda Toll Gate (¥200) and continue on past the Shimoda and Hachinohe Kita exits.
Follow this highway as it turns seemlessly into the Hachinohe Expressway and then into the Tohoku Expressway.
You can pick up the instructions below for the specific destination you are looking for.......
Morioka City and the Jusco Mall
Get off the Tohoku Expressway at the Morioka Minami IC. You will have travled about 140KM from where you entered the toll road in Shimoda.
The last time I checked, the toll was ¥3650.
Pay the toll and get on Route 46 following the signs for Morioka.
Follow Route 46 to Route 4 and turn right onto Route 4.
Stay on Route 4 for about 4.2KM, then make another right at the bottom of the large, gradual hill. (You will see a sign on the left for Route 106).
Continue on this road for about 300 meters to the first traffic light then turn left.
This street passed in front of the Hachiman Shrine on the left. You are now in Morioka City.
By the way, the Morioka Aeon Jusco Mall is just off the expressway.
When you get off at the Morioka IC, you will see it just to the east.