When you are shipping to the area that is consider as Relay area (the area where the third party shipping partner is required) by Sagawa Express, you will see a notice "This is a relay area, shipping surcharge may apply for this address" when Sagawa Express shipping label is created.
In addition, 中継 (Relay) will be displayed on the shipping label.
In some remote islands and mountainous areas, relay services will be necessary and refrigerated/frozen options may not be available. In such cases, you will find the error message, "Refrigerated/frozen delivery cannot be chosen for this area" when creating Sagawa Express shipping label with these options chosen for such areas.
For more details on the relay service fees and areas, please contact your Sagawa Express's sales representative directly.