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Okuyasu is a very curious person, showing deep interest in any new sight, which has led him toward Tonio Trussardi's restaurant and a crop circle where Mikitaka Hazekura rested. However, Okuyasu eventually grows out of it: at the end of the part, when Okuyasu was hanging between life and death, he took the decision to live and save Josuke. His inability to think was exploited on three occasions, and during all this, he was easily psyched out by his opponent. This results in him repeatedly and openly stating his lack of intelligence. Constant reliance on his big brother Keicho Nijimura and belittling from him made Okuyasu unable to make decisions that do not come out of instinct and is self-conscious about this limitation. Okuyasu has been known to be "not good at making decisions" and being generally dimwitted, although he has moments of genuine ingenuity. Okuyasu frequently acts out of impulses and rarely takes the time to observe or reflect in a fruitful manner.
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He consistently shows his emotions, which are more extreme than for the average individual, being ecstatic when he is happy, in tears when he is sad, and enraged when angry.
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Okuyasu is a very extroverted and impulsive man, acting by his own words "with his heart". The word that describes Okuyasu the best could be "childish", as he possesses several traits hinting to a certain immaturity.
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