Tokyo remained silent Wednesday over a potential visit to Hiroshima by U.S. President Barack Obama, even after the White House said he is considering making one on the sidelines of a Group of Seven summit next month.

"I would not comment on Obama's potential visit, as it is something the U.S. government decides," Chief Cabinet Secretary Yoshihide Suga told reporters on Wednesday.

Suga added, Tokyo has not requested such a visit. In 2009, Obama won the Nobel Peace Prize in part for his vision of a world without nuclear weapons.