Nagano Olympic Limited Phone Card 1998 NTT Japan Official Kinutani Koji Winter on paper Sleeve
You can still use it at public telephones in Japan.
new/unused phone card whose balance 50 (=500 jpy), in excellent condition with a cover.
Size about 8.7 x 5.4 cm / 3 & 1/4" X 2 & 1/4".