Japanese SIM Cards and Mobile Services: how it works in Japan — first-hand
Short answer
To obtain a Japanese phone number, you typically need a credit card and a residence card, which can be verified using a BIN checker for your card type. For internet access, consider affordable eSIMs from platforms like Trip.com, or troubleshoot connectivity issues by checking APN settings or visiting a phone service center at Bic Camera.
From real experience
To obtain a Japanese phone number, a credit card with a 'credit BIN' is often required by providers like Mobal.com.
If you only have debit cards (e.g., from Kyrgyzstan or Georgia), verify if they meet the credit card requirement. Use a 'BIN checker' tool online by entering the first six digits of your card number to determine its type (credit vs. debit) and potential eligibility.
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Recommendations for obtaining mobile data in Japan.
eSIMs purchased via platforms like Trip.com offer cost-effective data plans (e.g., 30GB for 1300 RUB for 15 days). Physical SIM cards are also available, and portable Wi-Fi devices can be rented, although potentially more expensive for individual use. Reliable internet connectivity is emphasized.
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Registering for local Japanese services like Ticket Pia or Mercari often requires a Japanese phone number.
Major providers like Mobal and Sakura Mobile are options, but they typically require a residence card (Zairyu card). Prepaid options with local numbers are limited for tourists without residency status.
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If your GLOBAL SIM For Japan (docomo) is not working, check APN settings and consider visiting a phone service center in Bic Camera for assistance.
This service may incur a fee (around 3000 JPY) and can involve waiting times.