The first extraordinary Diet session held under the Cabinet of Prime Minister Yukio Hatoyama adjourned Friday after the ruling bloc used its majority to ram through the Upper House a law to freeze the state's planned sale of shares in Japan Post Holdings Co. and its banking and insurance units.

The bill, which aims to halt the postal privatization process, has been high on the Democratic Party of Japan-led administration's agenda, prompting the government to extend the Diet session by four days in order to accommodate the legislation. The bill cleared the Lower House Tuesday.

"Thanks to everyone's efforts, we were able to ride out the extraordinary Diet session," DPJ Diet affairs chief Kenji Yamaoka said during a meeting Friday with Lower House DPJ lawmakers.