I went to Takayama, Gifu several days ago, and visited a Showa museum. Showa is an era between 1929-1989 with the throne of Emperor Showa(Hirohito). It features mainly about the life in 60's-70's, I guess.
I imagined that the streets and shops must have been like the first photo. The second photo is a class room, and the third is a text book. In Katakana words, it says "Sunmer text book". Wrong spelling!!!
It should have been "Summer text book", but the word "Summer" sounded to the publishers like "Sunmer".
A funny mistake...
