Japan's major mobile carriers have announced the postponement of the planned introduction of phone numbers beginning with "060," a development that affects the country's telecommunications infrastructure and potentially impacts foreign residents who may have been expecting new number allocations. According to reports from multiple Japanese news outlets including Livedoor News and Yahoo Japan, five major telecommunications companies made the joint announcement on July 8, 2026. The postponement represents a significant delay in Japan's efforts to expand its mobile phone numbering system to accommodate the growing demand for new telephone numbers. The "060" prefix was originally planned as the next expansion of Japan's mobile phone numbering system, which currently uses prefixes including "070," "080," and "090" for mobile devices. As these existing number ranges approach capacity due to Japan's high mobile phone penetration rate and the increasing number of connected devices, telecommunications authorities had been preparing to introduce the new "060" range to ensure sufficient availability of phone numbers for future users. The five companies involved in the postponement announcement include Japan's major telecommunications providers, though the specific carriers were not individually named in the initial reports. This coordinated delay suggests industry-wide challenges rather than issues affecting only individual companies. While the sources did not provide detailed explanations for the postponement, such delays in telecommunications infrastructure projects can stem from various factors including technical implementation challenges, regulatory considerations, or the need for additional preparation time to ensure smooth integration with existing systems. For foreign residents in Japan, this postponement has several practical implications. Those who may have been anticipating the availability of new "060" numbers—whether for new mobile contracts, additional lines, or business purposes—will need to continue working within the existing "070," "080," and "090" number ranges for the foreseeable future. The delay also means that Japan's current mobile numbering system will need to continue accommodating all new subscribers and devices without the additional capacity that "060" numbers would have provided. However, this should not immediately impact most users, as the existing number ranges still maintain sufficient availability for new allocations. Expats planning to obtain new mobile phone contracts or add additional lines to existing contracts should be aware that they will receive numbers from the current prefix ranges. There is no indication that the postponement will create shortages or difficulties in obtaining new mobile numbers in the near term. For businesses operating in Japan, particularly those that may have been planning marketing materials, business cards, or other communications incorporating anticipated "060" numbers, this postponement provides important planning information. Companies should continue using the existing number format standards and avoid any premature references to "060" numbers in their materials. The telecommunications industry has not announced a new timeline for when the "060" prefix might be introduced. Foreign residents and businesses should monitor announcements from their mobile carriers and telecommunications authorities for updates on when this expansion might be rescheduled. This development reflects the complex nature of telecommunications infrastructure management in Japan, where coordination among multiple carriers and regulatory bodies is necessary for significant system changes. While the postponement may cause inconvenience for some planning purposes, it demonstrates the industry's commitment to ensuring proper implementation rather than rushing deployment. Expats in Japan should continue to use existing mobile services as normal, as this postponement does not affect current phone numbers or service quality. Those needing new numbers can still obtain them through standard processes with their chosen mobile carriers, simply receiving numbers from the existing prefix ranges rather than the delayed "060" series.