A senior defense official denied an online report that he sexually assaulted his aide in a karaoke parlor, the latest scandal to rock Prime Minister Fumio Kishida’s administration in recent months.

Allegations reported by Bunshun Online were "not true," said Shingo Miyake, the parliamentary vice minister of defense, at a Diet committee session on Nov. 16.

Miyake, 61, is accused of groping his aide in a private karaoke room when she was working for him in Tokyo in 2013, according to a story posted by the Shukan Bunshun on its online platform the previous day.

The Upper House member of the ruling Liberal Democratic Party said his lawyer had lodged a formal protest with the weekly news magazine's publisher.

In the Diet session, Miyake said he may have met the aide outside his office in October 2013 after she expressed her intent to resign due to issues with her colleagues. But he couldn’t remember if he actually met her privately, he added.

His testimony followed Kishida's comments on the allegations, who said Miyake “should explain the matter more appropriately.”

The report dealt a fresh blow to Kishida’s administration, which has already suffered the resignations of three scandal-hit senior officials within a month.

The development also came amid calls for the Defense Ministry and Self-Defense Forces to address their toxic workplace culture in the wake of a series of sexual abuse and bullying cases.