This is a stamp rally commemorating the 20th anniversary of Aga Town, Higashi-Kanbara District. I participated as well, and the commemorative item at the goal was a badge (which was a far cry from what I was hoping for). Since Niitani Post Office has no public transportation, I got the stamp when I was going around. This is for those who wanted to participate in the stamp rally but gave up. You can go to all post offices except Kamikawa Post Office by train. The Hidachi Post Office (⑦) is not listed on the stamp sheet, but it is closed for lunch from 13:00 to 14:00. They say it will continue until the stamp sheets run out, but it may be over by the time they are shipped and arrive.