Kasatka Bay is located on the southern part of Iturup Island (Kuril Islands, Sakhalin Region) and is one of the most picturesque bays in the region. Its name refers to killer whales, marine mammals that can appear in these waters. The Japanese name for this bay is Hitokappu Wan; during the period when Iturup belonged to Japan, it was of strategic importance. It was from here that at the end of November 1941, as part of a secret operation, the Japanese squadron set out for the Hawaiian Islands to attack Pearl Harbor.

The shores of the bay are surrounded by hilly and mountainous terrain, covered with coniferous and mixed forests; the slopes in some places go down almost to the water itself, creating impressive landscapes. The climate in the Kuril Islands is harsh: fogs, frequent rains and strong winds are not uncommon, but this same feature gives the local nature its original beauty. In the vicinity of Kasatka Bay, you can see volcanic landscapes, hot springs and unusual rocks characteristic of Iturup.

After World War II, Iturup became part of the USSR, and is now part of the Russian Federation. The territory of Kasatka Bay does not have large infrastructure and is not so often visited by tourists, which allows it to be preserved almost in its original form. However, in recent years, ecotourism enthusiasts and wildlife researchers have increasingly come to Iturup, attracted by the unique landscapes, diversity of marine life and the historical significance of these places.