The Ezo red fox's formal name, kitakitsune (北狐), was given to the subspecies by Kyukichi Kishida when he studied them in Sakhalin in 1924.

Since 1999 activities have been undertaken to reduce the infection rate by causing anthelmintics to be ingested by wild Ezo red foxes.

[5] This can be treated if it is found at an early stage, but there is a possibility of death if treatment is delayed or if the parasitism is at a site where operations are difficult.

Ezo red foxes are wild animals and there has long been a supposition against human intervention, including supplementary feeding.

[7] For example, it has been confirmed that Ezo red foxes in Shiretoko National Park leave their home territories in April when the tourist season is over, seeking human food in Utoro city.

Since the 1980s Ezo red foxes have permanently settled in green spaces in some urban areas, such as Sapporo.