During the filming for the earlier "Majo no Takkyubin" (Kiki's Delivery Service-lit. Witch's Express Delivery) (1989), there was concern that the name of the film, along with the character "Jiji", a black cat, would create a trademark conflict with Kuroneko Takkyubin (Black Cat Express Delivery). Kuroneko Takkyubin is like UPS or FedEx in the US and has a black cat as its logo. A compromise was reached when Kuroneko Takkyubin agreed to act as a sponsor for the film. "Mimi wo Sumaseba" (1995), set in 1990's Japan, features "cameos" by several of Kuroneko Takkyubin's distinctive green and tan delivery trucks, including a shot of one in traffic early on, when Shizuku arrives at school, when she and Yuko are walking from school, and during the closing credits (where the logo is clearly visible). There may be many others in background shots.