In Doko Demo Issho, players act as a mentor to Toro, a white cat who dreams of becoming human. The core gameplay involves typing words using an on-screen keyboard to expand Toro's vocabulary and engage in structured conversations.
The game uses the PocketStation peripheral to transfer Toro to a portable device. This allows players to take Toro anywhere, enabling continued interaction and word-learning sessions outside the console.
Features include diverse personality traits for the Pocket People and a calendar system that tracks seasonal events. Player interactions directly influence the depth and complexity of Toro's speech patterns as he learns from the input provided.