Category: japan retractions

A stem cell researcher in Japan could end up with 23 retractions after officials at his former institution confirmed that he’d committed research misconduct in nearly two dozen papers. 

According to a report released last week by Aichi Gakuin University, Nobuaki Ozeki misused images, fabricated data and recycled text in 20 papers. Ozeki has had 19 papers retracted to date, 17 of which are described in the analysis. The latest report — an offshoot of one in 2018 that found he had committed misconduct in three papers — expands Ozeki’s liability to 22 articles. 

Ozeki has roughly 40 indexed journal articles on his CV, however, and journals may decide to conduct their own investigations into his work. Articles in the International Journal of Medical Sciences, Differentiation, and the Journal of Endodontics were named in the report but so far remain intact. 

Continue reading Stem cell researcher’s retraction count may near two dozen

A group of researchers at Aichi Gakuin University in Nagoya, Japan, continues to lose papers for duplication of images and text from their previous work, and is now up to 19 retractions.

Please see an update on this post.

Here’s a typical notice, for “Bone morphogenetic protein-induced cell differentiation involves Atg7 and Wnt16 sequentially in human stem cell-derived osteoblastic cells,” a paper published in 2016 in Experimental Cell Research, an Elsevier title:

Continue reading Two and a half years after findings of misconduct, stem cell researchers up to 19 retractions

A radiology journal has retracted two papers about the fallout from the 2011 Fukushima nuclear disaster in Japan over concerns that the researchers used “ethically inappropriate data” from the people they studied. 

The articles, which appeared in the Journal of Radiological Protection in 2017, were written by  Makoto Miyazaki, of the Department of Radiation Health Management at Fukushima Medical University, and Ryugo Hayano, a professor of physics emeritus at the University of Tokyo. As we reported, both papers were initially subject to expressions of concern last year.

The papers have been cited a total of 26 times, according to Clarivate Analytics’ Web of Science.

The retraction notice for “Individual external dose monitoring of all citizens of Date City by passive dosimeter 5 to 51 months after the Fukushima NPP accident (series): 1. Comparison of individual dose with ambient dose rate monitored by aircraft surveys” reads: 

Continue reading Fallout over Fukushima fallout papers continues as two are retracted

An itinerant materials scientist whose former lab head has accused publicly of misconduct is up to nine retractions for manipulating his data. 

We last wrote about Hossein Hosseinkhani in 2016, after he’d lost seven papers stemming from his time as a researcher in the lab of Yasuhiko Tabata, of the Institute for Frontier Life and Medical Sciences at Kyoto University in Japan. 

Since then, the researcher has lost two more articles, including, most recently, a 2001 article he wrote with Tabata that appeared in the Proceedings of the Japanese Academy of Sciences. According to the retraction notice for the paper, titled “In vitro transfection of plasmid DNA by different cationized gelatin with or without ultrasound irradiation.”

The notice reads: 

Continue reading Materials scientist up to nine retractions

A group of pharmacology researchers in Japan have now lost four papers over concerns about the validity of their data.  

The studies come from a group at Kobe Gakuin University, which conducted a misconduct investigation into the articles last year and concluded that 10 papers were affected. (Note: The report is in Japanese and does not identify the person or persons responsible for the deception.)

Among the latest to be retracted is a 2012 article in the Journal of Natural Medicines titled “Honokiol suppresses the development of post-ischemic glucose intolerance and neuronal damage in mice.”

Continue reading Investigation at Japanese university leads to four retractions

Two researchers from Japan — Jun Iwamoto and the late Yoshihiro Sato — have slowly crept up our leaderboard of retractions to positions 3 and 4. They have that dubious distinction because a group of researchers from the University of Auckland the University of Aberdeen, who have spent years analyzing the work. As their efforts continue, those researchers have been analyzing how journals respond to allegations, and what effect Sato and Iwamoto’s misconduct has had on the clinical literature. We asked three of the common authors of two recently published papers to answer some questions.

Retraction Watch (RW): Tell us a bit about the case you analyzed in these two papers, and what you found.

Continue reading ‘We badly need to change processes’: How ‘slow, opaque and inconsistent’ journals’ responses to misconduct can be