Yukichi Yamamatsu a 50 year old person from a developed country going to a developing country. Do not expect a cultural sensitive person. He depicts many problematic situations and ideas and shouldn't be looked at in positive light, but looked at in fascination of how he interacts with the new world around him as it chews him out.
Being an autobiographical and that the protagonist is in a foreign country where he doesn't speak the language, he stands as the only real character in the series. Most of everyone else doesn't need further characterization, but at times it feels like the other key reoccurring characters around
him are lacking and if he could better communicate with them we'd have more developed or funnier conversations with them bouncing of each other. But as it stands people are neglected to being funny angry faces who he can't understand. Which was a smart idea to focus more on the comedy aspect of this stupid story.
There's not much else to say as it's a quick read and Yukichi being an idiiot failing to cross the language barrier. If you enjoy exaggerated funny faces you'll enjoy this.