Japanese telecommunications companies have delayed the launch of mobile phone numbers starting with the "060" prefix, originally scheduled for July 2026 [1].

The delay affects the entire national mobile network. The introduction of the new prefix is necessary to prevent a shortage of available phone numbers as the population's demand for mobile connectivity continues to grow.

According to the companies, the postponement occurred because additional time is required for system compatibility and technical responses [2]. While a specific new start date has not been announced, the Ministry of Internal Affairs and Communications said it is urging providers to begin the rollout sequentially by the end of the current fiscal year [1].

Japan currently utilizes three primary mobile prefixes: "090," "080," and "070" [1]. Together, these prefixes account for a total of 270 million issued numbers [1].

Pressure to expand the numbering system has increased as existing stocks dwindle. As of July 1, 2026, there were approximately 4.6 million available numbers remaining within the "070" prefix [1].

The Ministry of Internal Affairs and Communications said it is urging that the service begin sequentially by the end of the fiscal year [1]. Telecommunications representatives said the start date was postponed because system responses required more time [2].

“The introduction of the new prefix is necessary to prevent a shortage of available phone numbers.”

The delay highlights the technical complexity of updating legacy telecommunications infrastructure across an entire national network. With only 4.6 million numbers left in the 070 block, Japan is facing a looming capacity crisis; any further delays in implementing the 060 prefix could potentially restrict the ability of new users or businesses to acquire mobile lines.