Tokyo prosecutors are questioning people from the political organizations of five factions of the main ruling Liberal Democratic Party over alleged underreporting of political funds.
The prosecutors began the questioning on a voluntary basis after receiving a complaint. It alleges the political groups failed to report a total of about 40 million yen, or about 267,000 dollars, in revenue from ticket sales at fund-raising parties.
The political funds control law requires political organizations to list in their funds reports the names of individuals or organizations that paid over 200,000 yen, or about 1,330 dollars, at a fund-raising party, along with the amounts paid.
Japanese Prime Minister Kishida Fumio spoke to reporters about the allegations on Monday.
Kishida said he is aware of the media reports, and that he must refrain from commenting on individual activities of investigative authorities from the government's standpoint.
The prime minister said that generally speaking, when questioned about political funds reports, each political organization should check the matter responsibly and handle it appropriately. He added that he believes each organization is dealing with it.