Kazuo Tachibana forms one half of the renowned Tachibana twins alongside his brother Masao, specializing in acrobatic aerial soccer techniques defined by high-speed coordination and innovative maneuvers, despite their signature moves carrying substantial injury risks. In elementary school, he played forward for Hanawa SS representing Akita Prefecture. During the Kids' Dream arc, Hanawa competed against Nankatsu and Meiwa in national qualifiers. Initially leveraging speed and twin coordination, the twins unveiled their aerial "Skylab" techniques against Nankatsu but were defeated, wearing jersey numbers 9 and 10. Progressing to Hanawa Middle School in the Boys' Fight arc, Kazuo and Masao developed the enhanced "Skylab Hurricane" aerial shot. After an initial quarter-final loss to Nankatsu in the national tournament, the technique became their hallmark. Selected for Japan Junior Youth, Kazuo adapted to a midfielder role during the International Jr. Youth tournament. Against Argentina, he and Masao executed the "Skylab Twin Shot" with Teppei Jito to score, though they sustained injuries. Reattempting it against France worsened their condition, hampering Japan’s campaign. For the Battle of World Youth arc, Kazuo intensified physical conditioning to endure their techniques. Initially excluded from Japan’s U-20 team over perceived overreliance on Masao, he trained independently and rejoined for the AFC Youth Championship. The twins repurposed aerial skills defensively, countering Fei Xiang against China. Against Mexico, their acrobatics neutralized the "5 Aztec Warriors" until García’s deliberate foul injured both, ending their tournament. In the Road to 2002 arc, Kazuo turned professional with JEF United Ichihara alongside Masao, wearing jersey number 41. Transitioning to midfield, he utilized agility and technical dribbling to support combinations while adapting his acrobatic style to reduce strain. During the Golden-23 arc, coach Kira repositioned Kazuo and Masao as "double volante" defensive midfielders. Their matured physiques could no longer sustain the Skylab Hurricane without severe injury, leading them to seal it. However, against U-22 Australia, they insisted on playing center-forwards to revive the technique. Receiving a cross from Taro Misaki, they scored decisively with the Skylab Hurricane but were incapacitated afterward. Standing 1.67 meters and weighing 60 kilograms in the Road to 2002 era, Kazuo consistently emphasizes aerial dominance, acrobatic interceptions, and rapid twin coordination. Key techniques include the Skylab Hurricane, Skylab Twin Shot, Flying Squirrel Jump, and Wild Monkey Tackle. His defensive contributions expanded in later arcs, though offensive aerial combinations remained his signature. Colloquially called "Japan's monkeys" with Masao due to agility and facial resemblance.