Many significant international conferences were held at this hall, including: The 3rd Conference of the Parties (COP) (Kyoto Conference) of The United Nations Framework Convention on Climate Change (UNFCCC) which adopted the Kyoto Protocol, The United Nations Conference on Disarmament, The Plenipotentiary Conference of the International Telecommunication Union (ITU), The Annual Meeting of the International Whaling Commission (IWC) and its Scientific Committee, The Conferences of the Parties of Convention on International Trade in Endangered Species of Wild Fauna and Flora (Washington Convention), The World Heritage Committee Session, and The Asia-Europe Meeting (ASEM).
京都議定書を採択した「第3回気候変動枠組条約締約国会議」（京都会議）や国際連合軍縮会議、国際電気通信連合全権委員会議、国際捕鯨委員会科学委員会及び総会、絶滅のおそれのある野生動植物の種の国際取引に関する条約（ワシントン条約）締約国会議、世界遺産委員会、アジア欧州会合(ASEM)など重要な国際会議が行われている。