Here's original PR article: https://group.ntt/en/newsrelease/2023/04/26/230426a.html https://group.ntt/en/newsrelease/2023/04/26/230426a.html Still I don't kno

Here's original PR article: https://group.ntt/en/newsrelease/2023/04/26/230426a.html https://group.ntt/en/newsrelease/2023/04/26/230426a.html Still I don't know how blockchain useful.