Unknown location again, it's marked on the map... Most likely Onegai Teachers location, but maybe Onegai Twins. Since I saw the anime like 5 years ago, plus my goldfish memory, I can't say for sure that I've never seen this location in the anime. All I can say is that I can't remember, but with my goldfiish brains I can't remember much to begin with -_-.
Note that the sign says "Lake Kizakiko", guess the place has two names? I'll stick with the name" Kizaki" though.

Again to make this location more interesting, I added some extra pictures. The H-shop staff gave me a ride to a nice little cafe. The picture of the house is the cafe, the owner's husband built the whole thing! On our way towards the cafe I made a few pictures as well.
From the H-shop towards the cafe we passed this road btw. Besides passing the road with the Kizakiko sign, there's nothing specials here. I advise you to take a picture of this place and walk towards the route that goes along the lakeside.