"They do not like to talk to the human, or very humanlike, robot," said Ishiguro.
Ishiguro created Geminoid in order to study humans, which he believes are not that different from robots.
"We are more autonomous and more intelligent — that's it," he said.
Japan's largest telecommunications company, NTT, is rolling out the 11-inch voice-enabled bots starting in the homes of seniors.
Soto is being touted as an interface for the "Internet of Things," allowing users to monitor and control any connected device, such as a TV or heart rate monitor.