Prosecutors arrested six people, including the mother of a Lower House lawmaker, on Wednesday as part of the vote-buying and campaign-funding scandal embroiling the Tokushukai hospital group.

They are suspected of providing local politicians and others with ¥60 million in vote-buying funds for the 2012 election.

Hideko Tokuda, 75, is suspected of providing around ¥20 million to the campaign office of her son, Takeshi, in December for the campaign that was held that month.