Tokyo Olympics 2020 August 18, 2022 [Mathematics problem difficult problem]Thorough explanation of the figure problem of the Olympic level (deviation value 80)! Explanation class that you can definitely understand (junior high school 3rd and high school ~)
Tokyo Olympics 2020 August 3, 2021 [Educational background world No. 1 appearance]Educational background Olympics! in Shibuya[wakatte TV]# 578
