(1)一時出国
出国期間中も非常時に大学から連絡が取れるように、以下の手続きを行ってください。
1,指導教員に連絡する。
2,学生課 留学生支援係へ海外渡航届を提出する。
https://student.office.tut.ac.jp/international/travel-notification/
(2)再入国許可
留学生が一時帰国したり調査などで外国へ行くとき、有効なパスポート及び在留カードを所持する者については、出国の日から1年以内(または在留期間満了の日までの期間)に再入国する場合に限り、再入国許可手続きは不要です。(この制度を「みなし再入国許可」といいます。)
▶ 再入国許可申請(出入国在留管理庁ウェブサイト)
Temporary Leave and Re-entry
(1) Temporary leave
Please follow the procedure below so that TUT can contact each student in case of emergency.
1,Tell your academic supervisor.
2, Go to the International Student Support section site and fill in the form.
https://student.office.tut.ac.jp/international/travel-notification/
(2) Re-entry permission
You are not required to apply for a re-entry permit, if you have a valid passport and a Residence Card and will be re-entering Japan within one year of your departure to continue your activities (This is called a special re-entry permit).
▶ Application for Re-entry Permission (Immigration Services Agency of Japan website)
※You can see a box on the left at the bottom saying English. This HP is multilingual so if you click the box, you can choose language.
In that case, about the re-entering Japan, there is no complicated procedures.
You are going to be asked at the airport, at the immigration, if you want to come back to Japan.
You probably fill in Re-entry ED card just before the immigration so there is a check box on the card then you check YES.