Strictly speaking, taxi tickets are those with payment columns that are supposed to be filled in by the passenger when he/she gets out the taxi (the driver must not fill it in to prevent embezzlement); however, in the broad sense, tickets here include coupons where the value is set up in advance and welfare tickets where the value is also set up in advance and are issued by the local government.
厳密にいえばチケットは金額欄を乗客が下車時に記入するもの（着服防止のため乗務員は記入できない）であるが、広義的には金額があらかじめ設定されたクーポン券や、地方自治体が発行する金額が決められた福祉チケットも含まれる。