Liberal Democratic Party Lower House lawmaker Toshinao Nakagawa tendered his resignation from the ruling party on Friday amid cascading revelations of his extramarital affair.
His departure from the LDP follows his decision Tuesday to step down as vice minister of economy, trade and industry.
The downfall of Nakagawa, a scion of an elite political family, was triggered by a scandal scooped by the weekly tabloid Shukan Shincho, which ran a five-page feature this week detailing the father of three's sexual romps and quoted his former mistress, who is not named, as calling him a "paranoid" control freak.