Tokyo police on Friday arrested former Diet member Kiyomi Tsujimoto on suspicion of committing fraud by skimming government salaries for her policy secretaries.
Tsujimoto, 43, a member of the Social Democratic Party, resigned from the House of Representatives when the scandal broke in March 2002.
Three others, including Masako Goto, a 66-year-old former policy secretary to SDP chief Takako Doi, were also arrested in connection with the case.