Sakakibara. M. Invitation to Undertake Interdisciplinary Research in Earth Science. The 1st International Seminar on Earth Sciences and Technology (ISEST 2021), Organizer: the Faculty of Earth Sciences and Technology, Institute of Technology Bandung, Indonesia, 2021.12.8-9, Online. (Invited Speaker)

Arifin, Y.I., Manyoe, I.N., Kasim, M. and Masulili, F. Geopark Indonesia Summit (Virtual Advisory of Aspring Geopark Gorontalo) with UNESCO Global Geopark, Ministry of BAPPENAS, Republic of Indonesia, 2021.11.01-02. (Invited Speaker)

Arifin, Y.I., Manyoe, I.N., Masulili, F. and Darmayanti, D. Geodiversity Assessment of Oluhuta geosite as geological heritage potential in Gorontalo Province. 4th International Conference of TREPSEA, 2021.09.16-18, Webinar. (Invited Speaker)

Gafur, N.A., Sakakibara, M., Komatsu, S., Sano, S. and Sera, K. Arsenic, mercury, and lead absorption by Pteris vittata in the Bone River area, Gorontalo Province, Indonesia. 4th International Conference of TREPSEA, 2021.09.16-18, Webinar. (Invited Speaker)

Pateda, S.M. and Sakakibara, M. The character of symptoms related to heavy metals contamination in Gorontalo Province, Indonesia. 4th International Conference of TREPSEA, 2021.09.16-18, Webinar. (Invited Speaker)

Sakakibara, M., Kasamasu, H. and Matsumoto, Y. Transformation of values and behavior towards solving environmental issues using transdisciplinary approach. 4th International Conference of TREPSEA, 2021.09.16-18, Webinar. (Invited Speaker)

Sugawara, H. Transdisciplinary research for sustainable eco-tourism and preservation obtained from collaboration with local museum and community of practice. Rinjani Lombok UNESCO Global Geopark, 2021.08.06, online. (Invited Speaker)

佐柳信男 アメとムチとモチベーションー国際開発研究から見えてきた最新知見―．国際学会学術研究者による非研究者へのナレッジ共有プロジェクト、2021.07.26、ウェビナー (Invited Speaker)

Arifin, Y.I. Development of whale shark geosite in Botubarani, Gorontalo Province, for sustainable tourism. SIMPOSIUM HIU＆PARI DI INDONESIA KE-3 PRESIMPOSIUM-ROAD TO GEOPARK GORONTALO, 2021.04.06, Gorontalo, Indonesia. (Invited Speaker)

Sakakibara. M. Plastic Waste Management, 2021.10.25, Organizers: Online. Tut Wuri Hadayani, Gorontalo State University (UNG) and Faculty of Law, UNG. (Invited Speaker)

Kyaw.W.T., Diagnosis of Chronic Mercury Intoxication, Medical Seminar “Medical Geology: Heavy Metal Pollution, Especially Mercury in Humans” for Master of Public Health Program, Faculty of Medicine, University of Lampung, 2021.10.19, Online. (International Guest Speaker)

Sakakibara. M. Environmental Pollution, Health Problems and Their Solutions, Medical Seminar “Medical Geology: Heavy Metal Pollution, Especially Mercury in Humans” for Master of Public Health Program, Faculty of Medicine, University of Lampung, 2021.10.19, Online. (International Guest Speaker)

Sakakibara. M. The Role of Mathematics and Natural Sciences in Transdisciplinary Approaches to Solve Complex Problems in Society. Seminar for Faculty of Science, Division of Geography of State University of Gorontalo, 2020.03.04, Gorontalo, Indonesia.

Sakakibara, M Mercury-Contaminated Whitening Cosmetics in Indonesia. The seminar for Master’s course students of Public health for University Muslim Indonesia, 2019.11.17-2019.11.17, University Muslim Indonesia, Makassar, Indonesia. (Invitation lecture)

Sakakibara, M. Studies of Environmental Pollutions and Health Problems in Indonesia for Remediating Polluted Environments. The seminar for the under graduate students of Public health for University Muslim Indonesia, 2019.11.17-2019.11.17, University Muslim Indonesia, Makassar, Indonesia. (Invitation lecture)

Sakakibara, M. Bio-Eco-Geo-Medi-Socio (BEGMES)-science study of environmental pollution in artisanal and small-scale gold mining area in Indonesia. 1st INTERNATIONAL CONFERENCE ON HEALTH SCIENCES IN DEVELOPING COUNTRY, 2019.11.16-2019.11.17, The Four Point Hotel Makassar, Indonesia.

Sakakibara, M. Transdisciplinary Reseach and Practice for Reducing Environmental Problems in ASEAN Countries. 1st ASEAN -Japan Meeting Pont of Collaboration by Stakeholders and Researchers for Reducing Environmental Problems in ASEAN Coutries, 2018.12.08-2018.12.09, Bandung, Indonesia.

Sakakibara, M. Transdisciplinary approach for solving complex society problems. Transdisciplinary research on legal studies, 2020.03.02-2020.03.02, State University of Gorontalo, Gorontalo state, Indonesia.

Sakakibara. M. Transdisciplinary approach for solving complex society problems. Seminar for Faculty of Law of State University of Gorontalo, 2020.03.02, Gorontalo, Indonesia.

Sakakibara. M. The Role of Mathematics and Natural Sciences in Transdisciplinary Approaches to Solve Complex Problems in Society. Seminar for Faculty of Science of State University of Gorontalo, 2020.01.09, Gorontalo, Indonesia.

9. Sakakibara, M. Bio-Eco-Geo-Medi-Socio (BEGMES)-Science Study of Environmental Pollution in Artisanal and Small-Scale Gold Mining Area in Indonesia. The 2nd ASEAN-Japan Meeting point of Collaboration by Stakeholders and Researchers for Reducing Environmental Problems in ASEAN Countries (TRPNEP2019), 2019.12.11-2019.12.11, Hilton Nay Pyi Taw, Naypyidaw, Myanmar.

Sakakibara, M. Reduction of Environmental Problems and Future Business by Introducing Sustainable Finance, The Issue of Chinese versus America Trade War. International Class at University Bosowa, 2019.10.22-2019.10.22, University Bosowa, Makassar, Indonesia.

Sakakibara, M. Waste and its Environmental Problem -How do we manage the waste? . International Class in School of Public Health of Makassar University, 2019.10.21-2019.10.21, Hasanuddin University, Makassar, Indonesia. (Invitation lecture)

Sakakibara, M. Heavy Metal Pollution and its Toxity. International Class at Indonesia Timur University, 2019.10.21-2019.10.21, Indonesia Timur University, Makassar, Indonesia. (Invitation lecture)

Sakakibara, M. Studies of Environmental Pollutions and Health Problems in Indonesia for Remediating Polluted Environments. International Class at University Muslim Indonesia, 2019.10.20-2019.10.20, University Muslim Indonesia, Makassar, Indonesia. (Invitation lecture)

Sakakibara, M. Co-creation of sustainable regional innovation for reducing risk of high-impact environmental pollution. ISeNREM 2019, 2019.08.15-9209.08.15, Bogor Agricultural University (IPB), Bogor, Indonesia.

Tanaka, K. Could payment by results (PbR) be future of PES in agriculture?. International Conference of the 50 Years PERHEPI, 2019.07.24-2019.07.26, Bogor Agricultural University (IPB), Bogor, Indonesia.

Sakakibara, M. Medical Geology and its Challenges. 2nd Japan - ASEAN Medical Seminar on Human Health Impact of Heavy Metals, 2019.05.05-2019.05.05, Indonesia, Gorontalo.

Sakakibara, M. Medical Geology and its Challenges. 1st Japan - ASEAN Medical Seminar on Human Health Impact of Heavy Metals, 2019.05.03-2019.05.03, Indonesia, Makassar.

Sakakibara, M., Tanaka, K., Kasamatsu, K., Shimagami, M., Komatsu, S. Co-creation of sustainable regional innovation for reducing risk of high-impact environmental pollution. International Conference on Environmental Sustainability and Climate Change, 2019.04.22-2019.04.23, ANA Crowne Plaza Osaka, Osaka.

Masayuki Sakakibara Co-Creation of Sustainable Regional Innovation for Reducing Risk of High-impact Environmental Pollution. International Lecturer, 2018.11.26-2018.11.26, Hasanuddin University, Makkasar, Indonesia.

Masayuki Sakakibara Co-Creation of Sustainable Regional Innovation for Reducing Risk of High-impact Environmental Pollution. International Lecturer, 2018.11.25-2018.11.25, Public Health Universitas Muslim Indonesia, Makkasar, Indonesia.

Masayuki Sakakibara Co-Creation of Sustainable Regional Innovation for Reducing Risk of High-impact Environmental Pollution. International Lecturer, 2018.11.25-2018.11.25, School of Health Sience of Makassar, Makassar, Indonesia.

Masayuki Sakakibara Earthquake safety Activity Program For Young Children. International Seminar of Inovative teaching method for young Learners at University of Gorontalo State, 2018.03.19-2018.03.19, University of Gorontalo State, Gorontalo, Indonesia.