To check your EID go to Settings > General > About > look under "EID".
Even if your smartphone which EID starts from the above numbers, your smartphone may not be available due to the specifications of the device.
Go to Settings > General > About > look under "Carrier Lock".
If you have other company's APN profile installed in your iPhone or iPad, you'll need to delete them to use VISITOR SIM.
Also, please be cautious as, most recently purchased NTT Network eSIM is dowloaded, previously purchased eSIM will not be available for download. If download is needed, reissuance fee of 1,000 yen would be required.