Mitsui Knowledge Industry Co., Ltd. (commonly known as Mitsui Knowledge IndustryCo., Ltd.) is a mobile network operator in Japan assigned PLMN code 441-207 by the national telecommunications authority.

The MCC 441 identifies Japan, while MNC 207 uniquely identifies this operator within the country. Together they form the PLMN (Public Land Mobile Network) identifier used by mobile devices for network selection, SIM card identification, and international roaming.

This assignment was last reported in ITU Operational Bulletin #1280 (Nov. 15, 2023). Search all MCC/MNC codes or view all Japan operators .