1. World Meteorological Organization (2019) WMO statement on the state of the global climate in 2019. https://library.wmo.int/doc_num.php?explnum_id=10211. Accessed on 2022/7/17
2. Paris Agreement (2015) Report of the conference of the parties to the united nations framework convention on climate change. https://unfccc.int/fles/essential_background/convention/application/pdf/english_paris_agreement.pdf3. Accessed on 2022/7/17
3. National Institute for Environmental Studies, Japan (2021) Greenhouse Gas Inventory Office in Japan. Annex I countries greenhouse gas emissions data by sector by gas (1990–2019) https://www.nies.go.jp/gio/aboutghg/index.html. Accessed on 2022/7/17 (in Japanese)
4. Japan Center for Climate Change Actions (2020) GHG emissions in data (Japan). https://www.jccca.org/global-warming/knowleadge05. Accessed on 2022/7/15 (in Japanese)
5. Ministry of Economy, Trade and Industry (2020) Current status of greenhouse gas emissions, etc. https://www.meti.go.jp/shingikai/sankoshin/sangyo_gijutsu/chikyu_kankyo/ondanka_wg/pdf/003_03_00.pdf. Accessed on 2022/7/15 (in Japanese)