This SnapShots in Akiba site
has some anime, game, or seiyuu related snapshots
taken while walking around in the Akihabara area.
Comments to snapshots@usagi.org.
In September 2019, there was a stamp rally at 4 anime shops for
the game Azur Lane.
The first 10000 people who collected the 4 stamps got a A5 sized
clear file.
This stamp rally was part of the Aki Fes (Akihabara Festival) 2019
featuring Azur Lane.
Those who spent over 1000 yen at the participating stores
got random Azurlane cards.