Okay, I gotta know because manga is really painting Japanese culture in a light that I can't believe but is an exchange diary really a thing that people do? I'm actually wondering here because I've never seen any kinda tradition like this in North America and maybe this is a result of the environment I grew up in but normally people either talk about their thoughts or don't talk about their thoughts to each other.
I don't know if this exchange diary is a positive reflection of the Japanese mindset to try to communicate when communication is difficult or if it's a negative reflection of non directional confrontation.