The government is considering modifying the construction plan for the new National Stadium, exploring ways to curb the unexpectedly high construction costs of ¥252 billion, Chief Cabinet Secretary Yoshihide Suga said Thursday.

Asked if the government may change the basic design for the 2020 Tokyo Olympics' main venue, featuring two gigantic keel arches for a roof, Suga remained noncommittal.

"Nothing has been decided over such matters as of now," Suga told a regularly scheduled news conference.