A photo took in Ukraine reminds me this commercial. It was made by SHUEISHA which is one of the publishing company in Japan.
The name of this commercial is “NA TSU I CHI” means “A book in Summer” I like this very much.

You can hear “Ko to no ha” in the song.
Word is “Ko to ba” In Japanese. “Ko to” means word and “ba (ha)” means leaves.
Words is made by a lot of “leaves of word” in Japan.

And the meaning of this song is so nice. Espacially,last sentence.

“I am traveling all over the world with some words.
I am looking for a word I’ll give you when I meet you someday”