Hayakaken

はやかけん

Location	Fukuoka
Launched	7 March, 2009
Manager	Fukuoka City Transportation Bureau
Currency	Japanese yen
Stored-value	Pay as you go
Credit expiry	10 years after last use.
Retailed	Fukuoka Subway stations
Website	http://subway.city.fukuoka.lg.jp/hayakaken/

Hayakaken (はやかけん^?) is a rechargeable contactless smart card ticketing system for public transport in Fukuoka, Fukuoka Prefecture, Japan. Fukuoka City Transportation Bureau introduced the system on March 7, 2009.

Its name stands for quick (速い, hayai^?), friendly (優しい, yasashii^?), comfortable (快適, kaiteki^?), and card (券, ken^?). Hayakaken (速かけん^?) also means "Because it's quick" in Hakata dialect.

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Wikipedia