CHIBA, Japan—A startup that has drawn investment from Toyota Motor Corp. showed off a robot that can pick up toys and clothes off the floor and put them in their proper places.

Tokyo-based Preferred Networks Inc. said it plans to sell robots that could handle tidying up and other household tasks such as receiving packages and putting dirty plates into the dishwasher. It didn’t say when, however, meaning children still likely have years of chores ahead of them.