Seals are more common than signatures in Japan.
If your country has a store that will make a seal for you, you'll be able to go through various procedures (opening a bank account, etc.) smoothly right after you arrive in Hiroshima♪
Especially for students from countries where Chinese characters aren’t used, custom-made seals may take time to get.
In my case, I brought a katakana seal that I made in my country.