Mt. Yotei has a beautiful conical shape, so it is nicknamed Ezo Fuji, which means Hokkaido's Mt. Fuji. Ezo(蝦夷/えぞ) is a former name of Hokkaido. It is similar to the former name of Tokyo, Edo（江戸/えど)，but they are different.
Then, we headed to Imakane town which is located between the volcano bay and Japan sea. Imakane is famous for its delicious potatoes. They produce high quality Danshaku(or baron) potatoes. One of their touristic features is Pirika Sea Cow. Thirty three parts of its bones were excavated since 1983 and turned out to be one of the world largest sea cow's bone which measured about 8 meters. It was named Pirika Sea Cow.
So the manhole cover I found at Pirika Dam has pirika sea cows.
I remember salmons were swimming up stream, so it may have been mid or late autumn.
After visiting the dam, we drove to west and dropped by Koda Kashiten, a confectionary shop in Setana and got Iwashu cream puffs. We love them so much!