The land ministry put the ball back in the government's court Friday, delivering three proposals for privatizing four debt-ridden expressway public corporations.

The proposals include options for the government to complete a 9,342-km expressway network at the cost of trillions of yen, which would contravene the purpose of privatization -- debt reduction.

The government and Liberal Democratic Party-led ruling coalition are expected to select a plan next month after hearing opinions from interested parties.