https://www.telecompaper.com/news/govt-to-assign-new-phone-numbers-for-ip-telephony--349021
Govt to assign new phone numbers for IP telephony - Telecompaper
Japan: The Telecommunications Ministry said it intends to begin assigning 11-digit phone numbers starting with 050 for IP telephony users in September 2002....
new phone numbersto assignip telephonygovttelecompaper