I hope someone can help me based on my description and sketch.
Thank you and I appreciate you responding but it's not the "one". It looks something like Toriyama but instead it gently wends its way up a shallow hill crossing back and forth across a creek rather than being based around a pond on the flat. Toriyama appears to be in a build up area whereas the restaurant I remember seemed a little more remote. Toriyama is very pretty and I will see if I can get a reservation. Kind regards.
Might be this. Ukaitoriyama in Takao