The behind-the-scenes powerbroker in Japan's ruling party has been hospitalized with ureter stones hours after going on trial in a political funding scandal.
Doctors said Friday that Ichiro Ozawa would need to be hospitalized for about a week.
They said 69-year-old Ozawa was rushed to a hospital Thursday night with severe back pain and vomiting.
Ozawa engineered the Democratic Party of Japan's 2009 rise to power. He pleaded not guilty to political funding violations at Tokyo District Court on Thursday in a scandal that could undermine his political influence.
He is accused of overseeing false accounting by his former aides in a 2004 land deal to hide a murky political fund.