Regarding the friendly Futsal Tournament named ECOCUP, which is held every year as a satellite-event of ESJ, we have decided to hold it as a special "ECOCUP 2021 Ecology Senryū Tournament" this year. Details will be announced on the ECOCUP 2021 homepage and the ECOCUP 2021 official Twitter account (@ecocup2021). Although the style is different from other years, based on the founding philosophy of the ECOCUP, we are going to plan a meeting that allows participants regardless of affiliation or age to promote interaction among participants. Please pay attention to future information. We will continue to look for your opinions on our homepage.