Phone and Post Office

Phone

You can purchase a mobile phone at a mobile phone/home appliance retailer. Carefully check a plan before you make a contract. If you wish to install a phone in your home (landline), contact the local NTT office or other phone company.

SIM card/eSIM

It can be purchased at airports, electronics stores, etc. Although not mediated by Chiba University, there is some companies introduced on the "Procedures before and immediately after entry into Japan" page.

Postal mails and Parcels

How to fill out your address

When you write the address, clearly write the addresses of both yourself and the recipient. Please make sure that the apartment name and room number are written. If the apartment does not have a name, address it to the landlord. (C/O Mr./Ms. XX)

Forwarding of postal mails

When you move, if you submit a “Application for Change of Address”, the post office will forward postal mails that are sent to your previous address for one year. Application forms are available at post office counters or you can also apply online. You will need to bring some proof that you are the person who is moving. (Such as National Health Insurance Card, Resident Card)
Japan Post e-moving
Or see "Practical Guide for International Students" here（Japanese・English・Chinese・Korean）

If you receive a Notice of Non-delivery inside your mailbox from post office

If you are sent mail that requires your seal or signature upon delivery, and you are not present at the time, the delivery person will leave a Notice of Non-delivery inside your mailbox. If you request redelivery, it will be delivered at the desired date and time. Please apply for redelivery using the contact information on the Notice of Non-delivery. You can also apply through the online service. On the date and time you specify for redelivery, you must be home to pick up the mail or package in person.
JP POST　Online Redelivery Request
JP POST　How to read the Redelivery Notice