David Kay
Google
They cancelled our reservation because we were foreigners without a Japanese phone number. Don't waste your time. Here is their email to me:
"In order to confirm your reservation, we ask international guests to provide only Japanese mobile phone number where we can reach you during your stay.
We have accepted some foreign visitors without Japanese phone number before, however some guests were no show.
Therefore we are very sorry to inform you that your reservation has been cancelled due to the following reason. Thank you for your understanding.
Your Sincerely
Mirei"