Retraction count for Shigeaki Kato climbs to 39

We’ve found another retraction for Shigeaki Kato, number seven on our leaderboard. Our count for Kato has now risen to 39; we added five retraction notices to our count for Kato last month. These notices follow an investigation at the University of Tokyo, where Kato used to work, which found 43 papers contained “likely altered or forged materials,” … Continue reading Retraction count for Shigeaki Kato climbs to 39

Shigeaki Kato up to 38 retractions

Our retraction notice count for Shigeaki Kato, number seven on our leaderboard, has grown to 38. The former University of Tokyo endocrinologist recently earned another retraction, for a paper in Archives of Biochemistry and Biophysics that contained image manipulation. As we’ve noted before, Kato resigned from the university in 2012 as it investigated his work for misconduct; in 2013 a Japanese newspaper reported that the investigation … Continue reading Shigeaki Kato up to 38 retractions

Shigeaki Kato up to 33 retractions, with five papers cited a total of 450 times

Former University of Tokyo researcher Shigeaki Kato continues to put big numbers on the board. Last month, we reported on his 26th, 27th, and 28th retractions, all in Nature Cell Biology and cited close to 700 times. Yesterday, EMBO Journal and EMBO Reports published a total of five more retractions for the endocrinology researcher, who … Continue reading Shigeaki Kato up to 33 retractions, with five papers cited a total of 450 times

Shigeaki Kato up to 28 retractions, with three papers cited nearly 700 times

Former University of Tokyo researcher Shigeaki Kato has notched his 26th, 27th, and 28th retractions, all in Nature Cell Biology. The three papers have been cited a total of 677 times. Here’s the notice for “DEAD-box RNA helicase subunits of the Drosha complex are required for processing of rRNA and a subset of microRNAs:”

Shigeaki Kato up to 25 retractions

Shigeaki Kato, who resigned from the University of Tokyo in 2012 after being found to have inappropriately manipulated dozens of images, has two more retractions, both in Molecular Cell. Here’s the notice for 2002’s “Nuclear Receptor Function Requires a TFTC-Type Histone Acetyl Transferase Complex:”

Shigeaki Kato up to 23 retractions

Shigeaki Kato, the former University of Tokyo endocrinology researcher found to have manipulated images in dozens of papers, has six more retractions, bringing his total to 23. Five of them appear in Molecular and Cellular Biology:

Five more retractions appear for Shigeaki Kato

Shigeaki Kato, the former University of Tokyo endocrinology researcher who resigned in 2012 and has retracted at least ten papers, by our count, has five more retractions. Here are the papers, all in the Journal of Biological Chemistry (JBC):

Shigeaki Kato notches five more retractions, including one in Nature

Shikeagi Kato, an endocrinology researcher who resigned from the University of Tokyo in March 2012 amid an investigation that concluded 43 of his papers should be retracted, has retracted five more papers. The newest is in this week’s Nature, for “GlcNAcylation of a histone methyltransferase in retinoic-acid-induced granulopoiesis,” a paper first published in 2009. Here’s … Continue reading Shigeaki Kato notches five more retractions, including one in Nature

Shigeaki Kato notches fifth retraction

An endocrinologist who resigned from the University of Tokyo last March as the university was investigating his work has retracted another paper. Here’s the notice for the paper by corresponding author Shigeaki Kato and colleagues in the Journal of Bone and Mineral Research: