Conferences
Talks in Conferences held in 2023
 ”On classical Iwasawa modules”, Fukuoka Number Theory Conference, September 1113, 2023
 "Euler and kolyvagin systems of Gauss sum type", Arithmetic of L functions, Instituto de Cinecias Matematicas (Madrid), May 22 26, 2023
Talks in Conferences held in 2021
 ”Some analytic quantities in the arithmetic of elliptic curves”, The 9th East Asia Number Theory Conference, Naha City, Okinawa, Japan, August 23 27, 2021
Talks in Conferences held in 2020
 "Derivatives of Kato's Euler system for elliptic curves", International Colloquium on Arithmetic Geometry at Tata Institute of Fundamental Research, Mumbai, India, on Junuary 9, 2020

"Survey on the BrumerStark conjecture and the proof by Dasgupta and Kakde", Algebraic Number Theory and Related Topics at Research Institute of Mathematical Sciences, Kyoto University, on December 3, 2020
Past Conferences of which I was an organizer
・Iwasawa 2023 In Memory of John Coates, University of Cambridge, July 17 21, 2023.・Workshop on the work of Dasgupta and Kakde and related topics, Keio University, February 16  19, 2022
・Pan Asian Number Theory Conference 2021, Research Institute of Mathematical Sciences, Kyoto University, December 6 10, 2021
・Mathematical Society of Japan Annual Meeting 2021, Keio University , March 15 18, 2021
・KeioYonsei Number Theory Workshop, Keio University, December 3 and 4, 2018
・Pan Asian Number Theory Conference 2018 , National University of Singapore, June 26  29, 2018
・Iwasawa 2017, University of Tokyo, July 19 28, 2017
・Pan Asian Number Theory Conference 2016, Taipei, Taiwan(台北、台湾）July 11 15, 2016
・Boston Keio Workshop 2015, Boston University, September 8  12, 2015
・Pan Asian Number Theory Conference 2015, Sanya, China (中国, 三亜), July 20 25, 2015
・Iwasawa 2015, King's College London, July 13 17, 2015
・Pan Asian Number Theory Conference 2014, Pohan, Postech, August 5  9, 2014
・Pan Asian Number Theory Conference 2013, Hanoi, Vietnam Institute for Advanced Study in Mathematics, Hanoi, Vietnam, July 22  26, 2013
・Number Theory Forum, Keio University, March 25 and 26, 2013
・Number Theory Day in Keio 2012, Keio University, September 13, 2012
・Iwasawa 2012, Heidelberg, July 30  August 3, 2012
・Pan Asian Number Theory 2012, Pune, India, July 23 27, 2012
・BostonKeio Summer Workshop 2011, Boston University, September 15 19, 2011
・Pan Asian Number Theory 2011, Beijing, August 22 26, 2011
・Pan Asian Number Theory 2010, Kyoto, RIMS, September 13 17, 2010
・Iwasawa 2010, Toronto , Fields Institute, July 5 9, 2010
・Pan Asian Number Theory 2009, Pohang
・Iwasawa 2008 , Kloster Irsee, Germany, July 2008
・UKJapan Winter School on Number Theory, University of Cambridge, January 7 10, 2007
・Congres Iwasawa 2006, Limoges, France, July 3 7, 2006
・Congres Iwasawa 2004, Besancon, France, 2004
・Algebraic Number Theory and Related Topics at RIMS, December 6 10, 2004
・Algebraic Number Theory and Related Topics at RIMS, December 1 5, 2003
・Algebraic Number Theory and Related Topics at RIMS, December 2 6, 2002
・MiniConference on Iwasawa theory, May 11 and 12, 2001