The former president of Tohoku University in Japan has just had a tenth paper retracted, because it duplicated one of his earlier works.
One of the most recent retractions by materials scientist Akihisa Inoue, late last month, was of a paper in Materials Transactions that had duplicated a now-retracted paper and was subject to an expression of concern in 2012:
This article had been acknowledged by the Editorial Committee of Materials Transactions as the secondary publication from the previously published paper, because the contents were almost identical. Recently, the original paper was retracted. Unreferred reproduction from another paper which was not pointed out in the announcement has also been found. Therefore, this article is improper as a scientific paper, and it is retracted with the primary author’s agreement. The authors are required to pay more careful attention to contributing papers.