This is 霧色ラーメン ( Kiri-Iro ramen ) literally, color of fog ramen.
It is said that Kushiro city is known as city of fog.
The city is covered with fog at least 50 ％ of a year.
This ramen express the fog town by its color of white pig bone soup.
Actually, pork bone soup ramen is originally from Kyushu, southern island of Japan but you can enjoy even in Kush...