Hello Daichi,
Installing MATLAB typically requires an account with MathWorks, as the software is licensed and needs to be activated. Unfortunately, it is not possible to install MATLAB without registering an account.
If you are having trouble receiving the verification email, please ensure that you have provided the correct email address. Also, check your spam or junk folder, and consider speaking with your email administrator if you cannot check it.
If you are being prompted to verify your email address, and have not received an email from MathWorks, please contact Customer Support for assistance verifying your MathWorks Account email address.
Hope this helps.