Riding a bus across a uniform fare section boundary, you must pay additional fare (which isn't the difference between the ordinary bus fare for your ride and the value paid for the card but is instead the amount to be paid when you're assumed to have boarded at the initial stop within the section).
また、均一区間外まで乗り越した場合は、追加運賃（差額ではなく、均一区間外分の初乗り運賃から）が必要である。