You can see your e-mail address in Kyoto University Student Account Management website below.

https://ecs.iimc.kyoto-u.ac.jp/

In the webpage of the above URL, you click the botton "Login to Setting" in "Re-set of password & e-mail forward," and you can see an user menu on the left side. Click "Set mail forwarding" and your e-mail address is displayed on the forwarding setting screen. You should logged out from the user menu on the left side after you check your e-mail address.

If you forget your ECS-ID or password, you should go to the support desk at the first floor of ACCMS South Building and consult with the staff.