One day unlimited ride pass, for Tokyo downtown area = 720 yen ($7.42 €5.54)

My son played Pokemon Stamp rally today. It is a game collecting series of stamps which are placed at certain stations. My son collected 6 stamps in downtown area. He used a one day unlimited ride pass to go around stations. The pass is called One day Tokunai pass, cost 360 yen ($3.71 €2.77). It is the kids price. The normal price is 720 yen ($7.42 €5.54). You can ride Japan Railway as many times as you want in the range of Tokyo 23 wards on the specific day. 

One day Tokunai pass

leaflet of Pokemon Stamp rally