Following the Great East Japan Earthquake on March 11, 2011, DOCOMO implemented robust new measures to better secure communication in key areas, respond more swiftly in disaster-stricken areas and improve customer convenience during disasters. Initiatives include more backup power-facilities for base stations, larger stocks of satellite mobile phones for emergency distribution, more vehicle-mounted base stations for cellular-to-satellite access while damaged network infrastructure is repaired, additional emergency wireless facilities to temporarily replace severed optical fiber lines, and much more.