How could I forget.....
Using the Google-when-hungry method we found Suzuya in Takayama a block away from our Ryokan. Superbly friendly environment with very good food. They do have Hida beef meals (you cook your own on a brazier at the table) and although we ate other delicious things, our table neighbours were positively post-orgasmic - Best beef ever they sighed - after their beef meal.