I saw on TV how the Japanese kill whales and dolphins. It was awful. It seems to me that there should be international inspectors who will monitor and seize vessels. You can even trade sanctions against Japan to enter if they do not stop hunting whales and dolphins.
It is not just the Japanese. If I am correct, then the Icelanders, Faroe Islanders and the Norwegians also hunt whales (not sure about the dolphins). In addition to that some of the aboriginal communities in Russia, Alaska, and the island of Bequia also hunt whales.