300 Yen per side for N225 (and JGB) at SGX.
www.interactivebrokers.com/php/generalAccount/commission.php#futures
www.interactivebrokers.com/php/retailAccount/products.php#asia
www.interactivebrokers.com/php/generalAccount/commission.php#futures
www.interactivebrokers.com/php/retailAccount/products.php#asia