Riesenseeadler
Flora within the park include the Sakhalin fir, Erman's birch, Arctic iris, Sendai-hagi, Ezo-kanzō, and small cranberry; fauna, the Japanese crane, white-tailed eagle, Steller's sea eagle, whooper swan, Leach's storm petrel, and tufted puffin. Prominent features include, from west to east, and , , , Lake Akkeshi (a Special Wildlife Protection Area and part of the Akkeshi-ko and Bekambeushi-shitsugen Ramsar site), Daikoku Island (a Special Wildlife Protection Area, the seabird breeding grounds of which are a Natural Monument), , , , , Kenbokki Island, , , and Kiritappu-shitsugen (a Special Wildlife Protection Area and Ramsar site, the peat-forming plant communities of which are a Natural Monument).