Sightings of the western stock of North Pacific right whales (Eubalaena japonica) in the far southeast of the Kamchatka Peninsula

KEIKO SEKIGUCHI, Graduate School of Arts and Science, International Christian University, 3–10–2 Osawa, Mitaka City, Tokyo 181-8585, Japan; HIROJI ONISHI, Faculty of Fisheries Science, Hokkaido University, 3–1–1 Minato-cho, Hakodate City, Hokkaido 041-8611, Japan; HIROKO SASAKI, Graduate School of Fisheries Science, Hokkaido University, 3–1–1 Minato-cho, Hakodate City, Hokkaido 041-8611, Japan; SHOTA HABA, Graduate School of Bioresources, Mie University, 1577 Kurimamachiya-cho, Tsu City, Mie 514-8507, Japan; YUKA IWAHARA, Graduate School of Environmental Science, Hokkaido University, 3–1–1 Minato-cho, Hakodate City, Hokkaido 041-8611, Japan; DAISUKE MIZUGUCHI, Wildlife Research Center, Kyoto University, 2–24 Tanaka-Sekiden-cho, Kyoto City, Kyoto 606-8203, Japan; MAYUKO OTSUKI, Graduate School of Environmental Science, Hokkaido University, 3–1–1 Minato-cho, Hakodate City, Hokkaido 041-8611, Japan; DAISUKE SAIJO, School of Fisheries Science, Hokkaido University, 3–1–1 Minato-cho, Hakodate City, Hokkaido 0418611, Japan; BUNGO NISHIZAWA, Graduate School of Fisheries Science, Hokkaido University, 3–1–1 Minato-cho, Hakodate City, Hokkaido 041-8611, Japan; HIRONA MIZUNO and NAOKI HOSHI, School of Fisheries Science, Hokkaido University, 3–1–1 Minato-cho, Hakodate City, Hokkaido 041-8611, Japan; TAKEHIKO KAMITO, Department of Life Science, International Christian University, 3–10–2 Osawa, Mitaka City, Tokyo 181-8585, Japan.