Thank you for contacting Q&A Forum. Regarding your inquiry, Microsoft has not published a region-specific roadmap for Japan regarding Microsoft Entra External ID. However, you can monitor the latest region-specific updates and deployment plans through these relevant and official resources:
- Microsoft Entra releases and announcements - Microsoft Entra | Microsoft Learn - This page is updated monthly and includes all new features, previews, and GA announcements across Microsoft Entra products. It’s the best place to monitor for any future updates specific to Japan or other regions.
- Microsoft regional account managers
- Azure regional service availability updates
- Microsoft Japan official blog or partner channels
For migration from Azure B2C tenant to Microsoft Entra External ID, please follow this link: https://learn.microsoft.com/en-us/entra/external-id/customers/how-to-migrate-users
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Megan.