Chiharu Shinonome's 3 year old brother and the youngest of the 6 siblings. Kazu has his elder sister's Chiharu's shyness and can often be seen being lead around by his much more confident sister Futaba, he will rarely speak louder than a whisper and has only once or twice been shown to make a desicion about what he wants. He is a fan of Nekomanman. Both he and Futaba Shinonome have an attachment to Densuke and see him as an older brother, especially Kazu. They always try to get Chiharu and Densuke together to make him their brother for real.