The nation's top court has upheld the death sentence of a man convicted of arson in which five people died.

The Supreme Court on Tuesday rejected Sunao Takami's appeal against a lower court ruling in the 2009 case, in which he poured gasoline on the floor of an Osaka pachinko parlor and set it alight. The sentence is now set to be finalized.

The presiding judge, Toshimitsu Yamasaki, said the 48-year-old Takami carries an "extremely grave liability for committing a premeditated, indiscriminate murder that targeted a pachinko parlor on a Sunday, when it was expected to draw a large crowd."