The widow, daughter and two other relatives of late Prime Minister Keizo Obuchi have been fined a total of 15 million yen for failing to declare income of more than 60 million yen, sources close to the case said Friday.

The four -- including Obuchi's widow, Chizuko, and daughter, Yuko, now a House of Representatives lawmaker -- declared an inheritance of 590 million yen that included financial deposits, real estate in Tokyo's Kita Ward and a golf club membership, the sources said. They paid 75 million yen in inheritance tax. But tax authorities later found undeclared income of more than 60 million yen, including deposits and stocks, the sources said.

Obuchi collapsed while in office in April 2000 and died the following month at age 62.