Tsune, the elderly aunt of Torajirō Kuruma (Tora-san), resides in Shibamata, Katsushika, Tokyo, with her husband Tatsuzō. Together, they run a traditional sweet shop specializing in dango, which functions as both the Kuruma family home and business. Tsune forms part of the core family unit alongside Tatsuzō, her nephew Tora-san, Tora-san's half-sister Sakura, Sakura's husband Hiroshi, and their son Mitsuo. She consistently appears in the family setting across the series, present during Tora-san's periodic and unexpected home visits. These visits frequently disrupt household dynamics, sparking family arguments that typically end with Tora-san departing abruptly. Tsune maintains her presence through multiple installments, reflecting her ongoing role within the family structure without documented changes to her background or character development.