An Internet site has been offering rewards of up to 100,000 yen for predicting the winners in Sunday's House of Representatives election.
The site known as eBet is run by the Tokyo-based Internet information provider Compath.
People who register are granted points for shopping at affiliated online sites. Under the site's usual procedure, they can use the points to answer questions on various topics, and accrue more points if they give the correct answers. The points can then be exchanged for cash or products worth up to 100,000 yen.