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20 of 51 papers
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Title Author(s) Journal Nature Retracted Citations Actions
Role of Vitamin K2 in the Treatment of Postmenopausal Osteoporosis
Medicine - Obstetri… Medicine - Orthoped… +1
Jun Iwamoto, Tsuyoshi Takeda et al.
Current Drug Safety
Bentham Science Publishe…
Retraction Aug 14, 2024
18
Efficacy of Oral Etidronate for Skeletal Diseases in Japan
Medicine - Orthoped… Medicine - Pharmaco…
Jun Iwamoto, Tsuyoshi Takeda et al.
Yonsei Medical Journal
Yonsei University Colleg…
Retraction Apr 20, 2023
1
Comparative effects of vitamin K and vitamin D supplementation on prevention of…
Biology - Cellular Toxicology +1
Jun Iwamoto, James K Yeh et al.
Bone
Elsevier
Retraction Feb 27, 2023
46
Comparison of the Effects of Alendronate and Alfacalcidol on Hip Bone Mineral D…
Medicine - Orthoped… Medicine - Pharmaco…
Jun Iwamoto, Yoshihiro Sato et al.
Yonsei Medical Journal
Yonsei University Colleg…
Retraction Feb 17, 2023
16
Experience with alendronate treatment for four years among Japanese men with os…
Medicine - Orthoped… Medicine - Pharmaco…
Jun Iwamoto, Yoshihiro Sato et al.
Therapeutics and Clinical Risk Man…
Taylor and Francis - Dov…
Retraction Aug 10, 2022
31
A Radiographic Study on the Associations of Age and Prevalence of Vertebral Fra…
Medicine - Orthoped… Radiology/Imaging
Jun Iwamoto, Hideo Matsumoto et al.
Journal of Osteoporosis
Hindawi
Expression of concern Aug 2, 2022
20
Effect of Treadmill Exercise on Bone Mass in Female Rats
Biology - Cellular Medicine - Orthoped… +1
Jun Iwamoto, Tsuyoshi Takeda et al.
Experimental Animals
Japanese Association for…
Retraction Aug 1, 2022
87
Effects of Vitamin K2 on Osteoporosis
Toxicology Medicine - Orthoped… +1
Jun Iwamoto, Tsuyoshi Takeda et al.
Current Pharmaceutical Design
Bentham Science Publishe…
Retraction Jul 6, 2021
67
Comparison of the effect of alendronate on lumbar bone mineral density and bone…
Biochemistry Biology - Cellular +4
Jun Iwamoto, Tsuyoshi Takeda et al.
Clinical Rheumatology
Springer
Retraction Jun 18, 2021
22
Effects of alendronate on metacarpal and lumbar bone mineral density, bone reso…
Toxicology Medicine - Obstetri… +2
Jun Iwamoto, Tsuyoshi Takeda et al.
Clinical Rheumatology
Springer
Retraction Jun 18, 2021
36
Effect of alendronate on bone mineral density and bone turnovermarkers in post-…
Medicine - Orthoped… Medicine - Pharmaco… +2
Jun Iwamoto, Mitsuyoshi Uzawa et al.
Journal of Bone and Mineral Metabo…
Springer
Retraction Feb 6, 2021
16
Beneficial Effect of Etidronate on Bone Loss After Cessation of Exercise in Pos…
Medicine - Obstetri… Medicine - Orthoped… +1
Jun Iwamoto, Tsuyoshi Takeda et al.
American Journal of Physical Medic…
Wolters Kluwer - Lippinc…
Retraction Feb 1, 2021
19
Bone quality and vitamin K2 in type 2 diabetes: Review of preclinical and clini…
Medicine - Diabetes Medicine - Orthoped… +1
Jun Iwamoto, Yoshihiro Sato et al.
Nutrition Reviews
Oxford Academic
Expression of concern Apr 28, 2020
20
Menatetrenone (Vitamin K2) and Bone Quality in the Treatment of Postmenopausal …
Medicine - Obstetri… Medicine - Orthoped… +1
Jun Iwamoto, Tsuyoshi Takeda et al.
Nutrition Reviews
Oxford Academic
Expression of concern Apr 28, 2020
33
Comparative effects of risedronate and calcitriol on cancellous bone in rats wi…
Biology - Cellular Toxicology +1
Jun Iwamoto, Azusa Seki et al.
Journal of Nutritional Science and…
Center for Academic Publ…
Retraction Feb 29, 2020
9
Beneficial effects of combined administration of alendronate and alfacalcidol o…
Biology - Cellular Toxicology +1
Jun Iwamoto, Tsuyoshi Takeda et al.
Journal of Nutritional Science and…
Center for Academic Publ…
Retraction Feb 29, 2020
6
Urinary Cross-linked N-telopeptides of Type I Collagen Levels in Patients with …
Medicine - Immunolo… Medicine - Obstetri… +1
Jun Iwamoto, Tsuyoshi Takeda et al.
Calcified Tissue International
Springer
Retraction Nov 19, 2019
19
Forearm Bone Mineral Density in Postmenopausal Women with Rheumatoid Arthritis
Medicine - Immunolo… Medicine - Obstetri… +1
Jun Iwamoto, Tsuyoshi Takeda et al.
Calcified Tissue International
Springer
Retraction Nov 19, 2019
25
Effect of whole-body vibration exercise on lumbar bone mineral density, bone tu…
Medicine - Obstetri… Medicine - Orthoped… +2
Jun Iwamoto, Tsuyoshi Takeda et al.
Aging Clinical and Experimental Re…
Springer
Retraction Oct 22, 2019
129
Effects of antifracture drugs in postmenopausal, male and glucocorticoid-induce…
Medicine - Orthoped… Medicine - Pharmaco… +1
Jun Iwamoto, Tsuyoshi Takeda et al.
Expert Opinion on Pharmacotherapy
Taylor and Francis
Retraction Aug 22, 2019
25
Role of Vitamin K2 in the Treatment of Postmenopausal Osteoporosis
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Yoshihiro Sato
Current Drug Safety ( Bentham Science Publishers )
Medicine - Obstetrics/Gynecol… Medicine - Orthopedics Medicine - Pharmacology
Cites Retracted Work Date of Article and/or Notice Unknown +2 more
18 citations
Open Access
DOI
Retraction: Aug 14, 2024
Published: Jan 01, 2006
1.3 year years since retraction
Efficacy of Oral Etidronate for Skeletal Diseases in Japan
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Yoshihiro Sato
Yonsei Medical Journal ( Yonsei University College of … )
Medicine - Orthopedics Medicine - Pharmacology
Misconduct by Author Notice - Limited or No Information
1 citations
Open Access
DOI
Retraction: Apr 20, 2023
Published: Jun 30, 2005
2.6 years years since retraction
Comparative effects of vitamin K and vitamin D supplementation on prevention of osteopenia in calcium-deficient young r…
Retraction
Jun Iwamoto , James K Yeh , Tsuyoshi Takeda et al.
Bone ( Elsevier )
Biology - Cellular Toxicology Medicine - Orthopedics
Concerns/Issues About Authorship/Affili… Concerns/Issues About Data +1 more
46 citations
Open Access
DOI
Retraction: Feb 27, 2023
Published: Aug 09, 2003
2.7 years years since retraction
Comparison of the Effects of Alendronate and Alfacalcidol on Hip Bone Mineral Density and Bone Turnover in Japanese Men…
Retraction
Jun Iwamoto , Yoshihiro Sato , Mitsuyoshi Uzawa et al.
Yonsei Medical Journal ( Yonsei University College of … )
Medicine - Orthopedics Medicine - Pharmacology
Investigation by Company/Institution Misconduct - Official Investigation(s) … +1 more
16 citations
Open Access
DOI
Retraction: Feb 17, 2023
Published: Aug 19, 2009
2.7 years years since retraction
Experience with alendronate treatment for four years among Japanese men with osteoporosis or osteopenia and clinical ri…
Retraction
Jun Iwamoto , Yoshihiro Sato , Mitsuyoshi Uzawa et al.
Therapeutics and Clinical Risk Management ( Taylor and Francis - Dove Pre… )
Medicine - Orthopedics Medicine - Pharmacology
Concerns/Issues About Authorship/Affili… Concerns/Issues About Data +4 more
31 citations
Open Access
DOI
Retraction: Aug 10, 2022
Published: Dec 06, 2010
3.3 years years since retraction
A Radiographic Study on the Associations of Age and Prevalence of Vertebral Fractures with Abdominal Aortic Calcificati…
Expression of concern
Jun Iwamoto , Hideo Matsumoto , Tsuyoshi Takeda et al.
Journal of Osteoporosis ( Hindawi )
Medicine - Orthopedics Radiology/Imaging
Concerns/Issues About Data Conflict of Interest +1 more
20 citations
Open Access
DOI
Expression of concern: Aug 02, 2022
Published: Dec 20, 2009
3.3 years years since retraction
Effect of Treadmill Exercise on Bone Mass in Female Rats
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Yoshihiro Sato
Experimental Animals ( Japanese Association for Labo… )
Biology - Cellular Medicine - Orthopedics Medicine - Sports
Concerns/Issues About Authorship/Affili… False/Forged Authorship
87 citations
Open Access
DOI
Retraction: Aug 01, 2022
Published: Feb 23, 2005
3.3 years years since retraction
Effects of Vitamin K2 on Osteoporosis
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Yoshihiro Sato
Current Pharmaceutical Design ( Bentham Science Publishers )
Toxicology Medicine - Orthopedics Nutrition
Cites Retracted Work Concerns/Issues About Data +1 more
67 citations
Open Access
DOI
Retraction: Jul 06, 2021
Published: Oct 15, 2004
4.4 years years since retraction
Comparison of the effect of alendronate on lumbar bone mineral density and bone turnover in men and postmenopausal wome…
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Yoshihiro Sato et al.
Clinical Rheumatology ( Springer )
Biochemistry Biology - Cellular Toxicology +3 more
Lack of IRB/IACUC Approval and/or Compl… Unreliable Results and/or Conclusions
22 citations
Open Access
DOI
Retraction: Jun 18, 2021
Published: Mar 25, 2006
4.4 years years since retraction
Effects of alendronate on metacarpal and lumbar bone mineral density, bone resorption, and chronic back pain in postmen…
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Yoshihiro Sato et al.
Clinical Rheumatology ( Springer )
Toxicology Medicine - Obstetrics/Gynecol… Medicine - Orthopedics +1 more
Lack of IRB/IACUC Approval and/or Compl… Unreliable Results and/or Conclusions
36 citations
Open Access
DOI
Retraction: Jun 18, 2021
Published: Jun 22, 2004
4.4 years years since retraction
Effect of alendronate on bone mineral density and bone turnovermarkers in post-gastrectomy osteoporotic patients
Retraction
Jun Iwamoto , Mitsuyoshi Uzawa , Yoshihiro Sato et al.
Journal of Bone and Mineral Metabolism ( Springer )
Medicine - Orthopedics Medicine - Pharmacology Medicine - Rehabilitation/The… +1 more
Author Unresponsive Lack of IRB/IACUC Approval and/or Compl…
16 citations
Open Access
DOI
Retraction: Feb 06, 2021
Published: Aug 19, 2009
4.8 years years since retraction
Beneficial Effect of Etidronate on Bone Loss After Cessation of Exercise in Postmenopausal Osteoporotic Women
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Shoichi Ichimura
American Journal of Physical Medicine & Rehabilitation ( Wolters Kluwer - Lippincott W… )
Medicine - Obstetrics/Gynecol… Medicine - Orthopedics Medicine - Pharmacology
Concerns/Issues About Data Concerns/Issues about Results and/or Co… +4 more
19 citations
Open Access
DOI
Retraction: Feb 01, 2021
Published: Jun 01, 2002
4.8 years years since retraction
Bone quality and vitamin K2 in type 2 diabetes: Review of preclinical and clinical studies
Expression of concern
Jun Iwamoto , Yoshihiro Sato , Tsuyoshi Takeda et al.
Nutrition Reviews ( Oxford Academic )
Medicine - Diabetes Medicine - Orthopedics Medicine - Pharmacology
Cites Retracted Work Misconduct - Official Investigation(s) …
20 citations
Open Access
DOI
Expression of concern: Apr 28, 2020
Published: Feb 14, 2011
5.5 years years since retraction
Menatetrenone (Vitamin K2) and Bone Quality in the Treatment of Postmenopausal Osteoporosis
Expression of concern
Jun Iwamoto , Tsuyoshi Takeda , Yoshihiro Sato
Nutrition Reviews ( Oxford Academic )
Medicine - Obstetrics/Gynecol… Medicine - Orthopedics Medicine - Pharmacology
Cites Retracted Work Misconduct - Official Investigation(s) …
33 citations
Open Access
DOI
Expression of concern: Apr 28, 2020
Published: Dec 01, 2006
5.5 years years since retraction
Comparative effects of risedronate and calcitriol on cancellous bone in rats with glucocorticoid-induced osteopenia
Retraction
Jun Iwamoto , Azusa Seki , Tsuyoshi Takeda et al.
Journal of Nutritional Science and Vitaminology ( Center for Academic Publicati… )
Biology - Cellular Toxicology Medicine - Orthopedics
Duplication of/in Article
9 citations
Open Access
DOI
Retraction: Feb 29, 2020
Published: Feb 01, 2006
5.7 years years since retraction
Beneficial effects of combined administration of alendronate and alfacalcidol on cancellous bone mass of the tibia in o…
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Hideo Matsumoto et al.
Journal of Nutritional Science and Vitaminology ( Center for Academic Publicati… )
Biology - Cellular Toxicology Medicine - Orthopedics
Duplication of/in Article
6 citations
Open Access
DOI
Retraction: Feb 29, 2020
Published: Feb 01, 2008
5.7 years years since retraction
Urinary Cross-linked N-telopeptides of Type I Collagen Levels in Patients with Rheumatoid Arthritis
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Shouichi Ichimura
Calcified Tissue International ( Springer )
Medicine - Immunology Medicine - Obstetrics/Gynecol… Medicine - Orthopedics
Concerns/Issues About Data Unreliable Data +1 more
19 citations
Open Access
DOI
Retraction: Nov 19, 2019
Published: Feb 10, 2003
6.0 years years since retraction
Forearm Bone Mineral Density in Postmenopausal Women with Rheumatoid Arthritis
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Shouichi Ichimura
Calcified Tissue International ( Springer )
Medicine - Immunology Medicine - Obstetrics/Gynecol… Medicine - Orthopedics
Concerns/Issues About Data Unreliable Data +1 more
25 citations
Open Access
DOI
Retraction: Nov 19, 2019
Published: Dec 21, 2001
6.0 years years since retraction
Effect of whole-body vibration exercise on lumbar bone mineral density, bone turnover, and chronic back pain in post-me…
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Yoshihiro Sato et al.
Aging Clinical and Experimental Research ( Springer )
Medicine - Obstetrics/Gynecol… Medicine - Orthopedics Medicine - Pharmacology +1 more
Concerns/Issues About Authorship/Affili… Investigation by Company/Institution +4 more
129 citations
Open Access
DOI
Retraction: Oct 22, 2019
Published: Apr 01, 2005
6.1 years years since retraction
Effects of antifracture drugs in postmenopausal, male and glucocorticoid-induced osteoporosis – usefulness of alendrona…
Retraction
Jun Iwamoto , Tsuyoshi Takeda , Yoshihiro Sato
Expert Opinion on Pharmacotherapy ( Taylor and Francis )
Medicine - Orthopedics Medicine - Pharmacology Medicine - Rehabilitation/The…
Duplication of/in Article
25 citations
Open Access
DOI
Retraction: Aug 22, 2019
Published: Oct 24, 2007
6.2 years years since retraction