セミクジラ
Before the arrival of the pelagic whaling fleet after 1835 into the range of the North Pacific right whale, the whale's population size, at least in the eastern part of its range, was probably at its original population size—in the range of 20,000–30,000 whales. The part of the whale population in the west around Japan may have been reduced from its original size as a result of the historic net whaling.