Yachigashira Hot Spring
Yachigashira Hot Spring(谷地頭温泉) is a local familiar and very nice one. The admission is reasonable and wide-clean bath room.
It is close to Yachigashira stop of street car, less than 5 minutes walk.
You may have a opportunity to speak local citizens and ask them for nice foods or reasonable restaurants. Hakodate citizens are very kind and cheerful.