Japan's Chief Cabinet Secretary Matsuno Hirokazu has declined to give concrete explanations about allegations that his office may have received kickbacks from selling tickets for political fundraising parties.

Sources say Matsuno's office allegedly received more than 10 million yen, or 69,000 dollars, in kickbacks over the five years through 2022, and failed to report the income in its political funds report.

Matsuno is a senior official of Seiwaken or the Seiwa policy study group, the largest faction of the main governing Liberal Democratic Party.

The faction is believed to have paid kickbacks to lawmakers who exceeded their quotas of ticket sales. It is accused of failing to register the extra income and payouts to lawmakers as expenditures in its reports.

Matsuno told reporters on Friday that he believes the faction will address the matter appropriately after confirming the facts.

He also noted that a complaint has been filed over the LDP's factions' handling of political funds, and an investigation is underway.

Asked whether he has any intention of resigning as chief cabinet secretary, he said that he wants to continue to carry out his duties to fulfill his responsibilities.

A reporter asked him whether he has been told by Prime Minister Kishida Fumio not to answer questions over the matter. Matsuno replied that it was his own decision.