Osaifu-Keitai (おサイフケータイ, Osaifu-Kētai), literally "Wallet Mobile", is the de facto standard mobile payment system in Japan. Osaifu-Keitai services include electronic money, identity card, loyalty card, fare collection of public transits (including railways, buses, and airplanes), or credit card. The term "Osaifu-Keitai" itself is a registered trademark of NTT Docomo. The system was developed by NTT Docomo but the system is also supported by other mobile phone operators. It uses Sony's Mobile FeliCa ICs.