South Georgia became the world's largest whaling centre, with shore bases at Grytviken (operating 1904–64), Leith Harbour (1909–65), Ocean Harbour (1909–20), Husvik (1910–60), Stromness (1912–61) and Prince Olav Harbour (1917–34). The companies involved included Compañía Argentina de Pesca, Christian Salvesen Ltd (UK), Albion Star (South Georgia) Ltd. (Falkland Islands), the Norwegian whaling companies Hvalfangerselskap Ocean, Tønsberg Hvalfangeri and Sandefjord Hvalfangerselskap, as well as the Southern Whaling and Sealing Company (South Africa). The Japanese companies Kokusai Gyogyo Kabushike Kaisha and Nippon Suisan Kaisha sub-leased respectively Grytviken in 1963–64 and Leith Harbour in 1963–65, the last seasons of South Georgia whaling.