During the beginning of the series, the TV show was mostly based on the storyline in the original manga. As the show progressed, more and more episodes became anime-original. The show works under a sliding timescale where the characters have maintained their ages throughout the course of the...
when Kazama was extremely frustrated and lonely in several episodes, Shin-chan was the only one who stayed with him. Even though Kazama always denied when Shin-chan says that he is his best friend, his best friend is Shin-chan too. He shows unexpected actions in the movieMy Moving Story!