The shogunate seal is a seal that is given to you when you visit a shrine or temple as a proof.
The name of the shrine or temple, the name of the principal deity, and the date of the visit are written in black ink.
Originally, the shogunate was given as a token of having completed a sutra.
Recently, however, more and more shrines and temples are offering the shogunate seal as a token of having visited a shrine, rather than as a token of having completed a sutra.
Also, each shrine and temple has a different design.
Just as no two shrines or temples are the same, no two shogunate designs are the same.
For this reason, some people visit the shrine while collecting the shogunate seal, looking forward to seeing the different designs of the shogun.