A minor antagonist from an upper-class background who attempted to sabotage Chu Xuan's open lecture by questioning whether the rapid-growth gene theory was truly created by Chu Xuan alone. He was outsmarted by Chu Xuan's clever response using the phrase 'carry the tray in your mouth,' which Okamoto interpreted as a threat based on a past incident involving his uncle's assistant. He felt insulted but could not refute the interpretation among his peers. He later contacted his uncle Okamoto Yuji after the incident.
