Uit
ex-skf.blogspot: "
Sumitomo Osaka Cement Shipped Radioactive Cement Made From Koriyama Sewage Sludge in Tochigi, Ibaraki, Gunma Prefectures 
It was Sumitomo Osaka Cement Company, the 3rd largest cement manufacturer in Japan after Taiheiyo Cement and Ube-Mitsubishi Cement, who unknowingly bought the radioactive sewage sludge from Koriyama City's treatment center.
From Yomiuri Shinbun (11:06PM JST 5/3/2011):
...
According to Sumitomo Osaka Cement (headquartered in Tokyo), the sewage sludge was recycled as cement material at its plant in Sano City in Tochigi Prefecture. The company has stopped production and shipment of the cement from the plant.
928 tons of the sewage sludge [from Koriyama facility?] have been used since the Fukushima I Nuke Plant accident, and the cement has been shipped to Tochigi, Gunma, and Ibaraki Prefectures and other locations.
..."
928 tons? So it is almost double of what was initially reported (500 tons).
Additional info from the cement company's press release on May 2:
The company received sewage sludge from the treatment center in Koriyama since the Fukushima accident from March 12 to April 30. [So, total of 50 days.]
The total amount of the sewage sludge received: 928 tons. [18.56 tons per day, NOT 10 TONS per day as initially reported.]
Sumitomo Osaka Cement is understandably upset.
..."
