How to Receive Your Mail at a Post Office in Japan
It's worthy to know that Japan Post allows you to use any Japan Post Office address as a delivery address. The service is known as "kyoku dome"(局留め, it literally means "stopped at the post office").
You can use this service when you are moving around from one location to another or when you are not sure if you can be at home to receive the mail. Use the address of the post office in the area you will be staying as the delivery address and have the package sent to a post office. You can pick it up once it is delivered to the post office.
Bring your ID for collection
Unlike picking up a package at a convenience store, you don't need to navigate any machine to print the barcode or sign up as a member to use this service. You simply have to bring your ID such as a passport to collect the package. The recipient's name should be exactly the same as on your ID and not a nickname.
The package will be returned to the sender if it is not collected within 10 days, so don't forget to pick it up.
For CDJapan Rental customers
Most of the CDJapan Rental customers choose to receive their package at a post office in airports. However, since the airport post offices are not open 24h, and some are not open on weekends and holidays, not everybody can choose this option.
If you are staying at a hotel, receiving at a hotel is good. Big hotels will handle this as part of their service but some smaller accommodations don't accept it. Note that many capsule hotels don't accept to receive any mail for their guests. You may want to ask your accommodation in advance.
Receiving at your friend's house or Airbnb is also an option but you have to be prepared. Please read the detail in this post: How to Receive Mail at an Airbnb Apartment Address.
When our customers are not sure about the delivery address, we always recommend them to receive the package at a post office. It is a very safe option.
There are post offices that are open 24/7. Receiving at those post offices will be very easy as you don't have to worry about their opening hours. You can check the list of the 24h post office on the following post: A List of 24hr Post Offices in Japan.