#japantrip From Ichijodani, head east on National Route 158 and follow the forest road Miyama Line for a few kilometers until you reach a parking lot halfway up the mountain. Climb the stairs on the west side and emerge along the ridge, then proceed along the route.
You will arrive at the east side of the castle ruins.
There is an information board in front of the entrance to the castle ruins that describes the territory, and if you look to the left and right, you can see the ridged vertical moat. If you go south along the hill on the east side, you will find Ichinomaru to Sannomaru.