What makes me think it’s a kind of cipher.
When I went to the shopping mall last time, I saw funny stuff at a grocery store.
About the Japanese language
The Japanese language can be written both vertical writing and horizontal writing.
But in this stuff, the Japanese text of one line includes a mixture of vertical writing and horizontal writing.
It was so strange, and it made me think that it was a kind of cipher.
It says “dry seafood (ドライ・シーフード)”.