The island, with a 4.5-kilometer coastline, forms part of Akkeshi Prefectural Natural Park.

[2] The name is derived from the Ainu kene-pok or "beneath the alder" (Alnus japonica).

[3] During studies in 1999, four species of mammal (long-clawed shrew, grey-sided vole, harbour seal, and visiting sika deer) and forty-one species of birds were recorded on the island; there were no amphibians or reptiles.

[4] Of the birds, Leach's storm petrel (some twenty thousand pairs), Japanese cormorant, Japanese snipe, slaty-backed gull, and common reed bunting were identified as breeding on Kenbokki.

[5] Masanori Hata founded Mutsugorō Animal Kingdom (ムツゴロウ動物王国) after his stay on the island.