Idemitsu Kosan Co.,Ltd. / Dividends

Declaration date	Ex date	Record date	Payment date	Amount
March 27, 2007				¥150.00
September 25, 2007				¥3.75
March 26, 2008				¥3.75
September 25, 2008				¥3.75
March 26, 2009				¥3.75
September 25, 2009				¥3.75
March 29, 2010				¥3.75
September 28, 2010				¥3.75
March 29, 2011				¥3.75
September 28, 2011				¥3.75
March 28, 2012				¥6.25
September 26, 2012				¥5.00
March 27, 2013				¥5.00
September 26, 2013				¥5.00
March 27, 2014				¥5.00
September 26, 2014				¥5.00
March 27, 2015				¥5.00
September 28, 2015				¥5.00
March 29, 2016				¥5.00
September 28, 2016				¥5.00
March 29, 2017	March 30, 2017	March 31, 2017	June 8, 2017	¥5.00
September 27, 2017	September 29, 2017	September 30, 2017	December 7, 2017	¥8.00
March 28, 2018	March 30, 2018	March 31, 2018	June 7, 2018	¥8.00
September 26, 2018	September 28, 2018	September 30, 2018	December 7, 2018	¥10.00
March 27, 2019	March 29, 2019	March 31, 2019	June 6, 2019	¥10.00
September 27, 2019	September 27, 2019	September 30, 2019	December 6, 2019	¥16.00
March 30, 2020	March 30, 2020	March 31, 2020	June 11, 2020	¥16.00
September 29, 2020	September 29, 2020	September 30, 2020	December 7, 2020	¥12.00
March 30, 2021	March 30, 2021	March 31, 2021	June 2, 2021	¥12.00
September 29, 2021	September 29, 2021	September 30, 2021	December 7, 2021	¥12.00
March 30, 2022	March 30, 2022	March 31, 2022	June 2, 2022	¥10.00
September 29, 2022	September 29, 2022	September 30, 2022	December 7, 2022	¥12.00
March 30, 2023	March 30, 2023	March 31, 2023	June 2, 2023	¥12.00
September 28, 2023	September 29, 2023	September 30, 2023	December 7, 2023	¥16.00
March 28, 2024	March 29, 2024	March 31, 2024	June 4, 2024	¥16.00
September 27, 2024	September 27, 2024	September 30, 2024	December 6, 2024	¥18.00
March 28, 2025	March 28, 2025	March 31, 2025	June 4, 2025	¥18.00
September 29, 2025	September 29, 2025	September 30, 2025	December 1, 2025	¥18.00