Where it comes, Why Regional? The beginning was Jun 5th,2009 announcement #0605009 of Health Ministry."Local government will make plan for build medical function up and obtaining medical workers are called ‘Regional Medical Reborn Plan’ they prefer to make budget and proceed the plan." Along the description, local government built over 200 networks without consideration of information exchange to other regions.From the ICT perspective, Cloud service like Amazon, Microsoft and Google were in progress not matured and closed networking or IPsec VPN were preferred as well at that time. Those are reason why the regional network spread.Now, "National Medical Information Platform" of "Medical DX 2030" that planning medical information sharing, and Online Eligibility verification system for health insurance are available not regional but nationwide.These changes are enabled by penetration rate of smartphone. 9.7% in 2010 but 88.6% in 2021.ID-Link will change the way to share information with all institutions through patient’s will and using mobile phone, like "Medical DX 2030" do.