In some cases, depending on the country, the post office website will show where the package is in the details section.
Try checking the package location using the tracking number in the shipment email, by entering it in the following website.
Link to Overseas Post Offices (Japan Post):
https://www.post.japanpost.jp/int/ems/delivery/link_en.html
In some cases, the post office website may not show details of the package whereabouts when entering the tracking number. In this case, please contact the postal service for your country directly with your enquiry and share with them the tracking number.
If you have any other questions or concerns, please feel free to contact Ippodo.