All Stories

  1. Immunohistological analysis reveals IgG1-dominant immunophenotype of tubulointerstitial nephritis unassociated with IgG4-related diseases

    Article • International Urology and Nephrology, February 2024, Springer Science + Business Media

    Hideki Fujii

  2. Unravelling the Complexities of Myocardial Injury in Patients with Chronic Kidney Disease

    Article • Journal of Atherosclerosis and Thrombosis, January 2024, Japan Atherosclerosis Society

    Hideki Fujii

  3. Association of abnormalities in electrocardiography and ultrasonic echocardiography with the occurrence of cardiovascular disease in patients with advanced chronic kidney disease

    Article • Clinical and Experimental Nephrology, December 2023, Springer Science + Business Media

    Hideki Fujii

  4. Exploring the implications of blocking renin-angiotensin-aldosterone system and fibroblast growth factor 23 in early left ventricular hypertrophy without chronic kidney disease

    Article • Frontiers in Endocrinology, December 2023, Frontiers

    Hideki Fujii

  5. Clinical Implication of Consistently Strict Phosphate Control for Coronary and Valvular Calcification in Incident Patients Undergoing Hemodialysis

    Article • Journal of Atherosclerosis and Thrombosis, November 2023, Japan Atherosclerosis Society

    Hideki Fujii

  6. Survival benefit of living donor kidney transplantation in patients on hemodialysis

    Article • Clinical and Experimental Nephrology, October 2023, Springer Science + Business Media

    Hideki Fujii

  7. Hypocalcemia and cardiovascular mortality in cinacalcet users

    Article • Nephrology Dialysis Transplantation, September 2023, Oxford University Press (OUP)

    Hideki Fujii

  8. Investigation of bone mineral density and the changes by enzyme replacement therapy in patients with Fabry disease

    Article • Molecular Genetics and Metabolism, August 2023, Elsevier

    Hideki Fujii

  9. Renal protective effects of astragalus root in rat models of chronic kidney disease

    Article • Clinical and Experimental Nephrology, May 2023, Springer Science + Business Media

    Hideki Fujii

  10. Not baseline but time-dependent erythropoiesis-stimulating agent responsiveness predicts cardiovascular disease in hemodialysis patients receiving epoetin beta pegol: A multicenter prospective PARAMOUNT-HD Study

    Article • International Journal of Cardiology, March 2023, Elsevier

    Hideki Fujii

  11. Comparison of two protocols for steroid pulse therapy in patients with IgA nephropathy: a retrospective observational study

    Article • BMC Nephrology, April 2022, Springer Science + Business Media

    Hideki Fujii

  12. Clinical value of serum cholinesterase levels in Nephrotic syndrome: an observational study

    Article • BMC Nephrology, April 2022, Springer Science + Business Media

    Hideki Fujii

  13. Screening for Fabry disease among male patients on hemodialysis in Awaji Island

    Article • Therapeutic Apheresis and Dialysis, March 2022, Wiley

    Hideki Fujii

  14. Detecting MUC1 Variants in Patients Clinicopathologically Diagnosed With Having Autosomal Dominant Tubulointerstitial Kidney Disease

    Article • Kidney International Reports, January 2022, Elsevier

    Hideki Fujii

  15. Statin Use Influence on the Occurrence of Acute Kidney Injury in Patients with Peripheral Arterial Disease

    Article • Journal of Atherosclerosis and Thrombosis, January 2022, Japan Atherosclerosis Society

    Hideki Fujii

  16. Changes of FGF23 and the Renin-Angiotensin-System in Male Mouse Models of Chronic Kidney Disease and Cardiac Hypertrophy

    Article • Journal of the Endocrine Society, December 2021, Endocrine Society

    Hideki Fujii

  17. Beneficial screening of Fabry disease in patients with hypohidrosis

    Article • The Journal of Dermatology, November 2021, Wiley

    Hideki Fujii

  18. X-chromosome inactivation patterns in females with Fabry disease examined by both ultra-deep RNA sequencing and methylation-dependent assay

    Article • Clinical and Experimental Nephrology, June 2021, Springer Science + Business Media

    Hideki Fujii

  19. optimal phosphate in dialysis patients

    Article • Journal of the American Society of Nephrology, February 2021, American Society of Nephrology

    YOSHITAKA ISAKA, Hideki Fujii

  20. Influence of oxidative stress on vascular calcification in the setting of coexisting chronic kidney disease and diabetes mellitus

    Article • Scientific Reports, November 2020, Springer Science + Business Media

    Hideki Fujii

  21. Evaluation of aortic calcification using a three-dimensional volume-rendering method in patients with end-stage kidney disease

    Article • Journal of Bone and Mineral Metabolism, November 2020, Springer Science + Business Media

    Hideki Fujii

  22. Changes in blood pressure during treatment with the tyrosine kinase inhibitor lenvatinib

    Article • Clinical Kidney Journal, October 2020, Oxford University Press (OUP)

    Hideki Fujii

  23. Relationship between parathyroid hormone and renin–angiotensin–aldosterone system in hemodialysis patients with secondary hyperparathyroidism

    Article • Journal of Bone and Mineral Metabolism, September 2020, Springer Science + Business Media

    Hideki Fujii

  24. Histological changes of a kidney in a recipient who received an allograft from a patient with Fabry disease

    Article • Journal of Nephrology, June 2020, Springer Science + Business Media

    Hideki Fujii

  25. Pregnant Patient on Hemodialysis Who Showed Remarkable Improvement of Severe Hyperparathyroidism by Strict Serum Phosphorus Control

    Article • Internal Medicine, March 2020, Japanese Society of Internal Medicine

    Hideki Fujii

  26. Comparison of the effects of lanthanum carbonate and calcium carbonate on the progression of cardiac valvular calcification after initiation of hemodialysis

    Article • BMC Cardiovascular Disorders, January 2020, Springer Science + Business Media

    Hideki Fujii

  27. Changes in the whole/intact parathyroid hormone ratio and their clinical implications in patients with chronic kidney disease

    Article • Journal of Nephrology, January 2020, Springer Science + Business Media

    Hideki Fujii

  28. Effects of lanthanum carbonate on bone markers and bone mineral density in incident hemodialysis patients

    Article • Journal of Bone and Mineral Metabolism, June 2019, Springer Science + Business Media

    Hideki Fujii

  29. One‐year impact of kidney transplantation on cardiac abnormalities and blood pressure in hemodialysis patients

    Article • Therapeutic Apheresis and Dialysis, April 2019, Wiley

    Hideki Fujii

  30. Characteristics of coronary artery disease in chronic kidney disease

    Article • Clinical and Experimental Nephrology, March 2019, Springer Science + Business Media

    Hideki Fujii

  31. Changes in serum and intracardiac fibroblast growth factor 23 during the progression of left ventricular hypertrophy in hypertensive model rats

    Article • Clinical and Experimental Nephrology, December 2018, Springer Science + Business Media

    Hideki Fujii

  32. Essential points from Evidence-based Clinical Practice Guidelines for Chronic Kidney Disease 2018

    Article • Clinical and Experimental Nephrology, December 2018, Springer Science + Business Media

    Hideki Fujii, Dr Hirotaka Komaba

  33. Multicentre cross-sectional study for bone-articular lesions associated with dialysis related amyloidosis in Japan

    Article • Nephrology, July 2018, Wiley

    Hideki Fujii

  34. Role of Uremic Toxins for Kidney, Cardiovascular, and Bone Dysfunction

    Article • Toxins, May 2018, MDPI AG

    Hideki Fujii

  35. Association between Parathyroid Hormone and Cardiovascular Disease

    Article • Therapeutic Apheresis, April 2018, Wiley

    Hideki Fujii

  36. Rationale, design, and characteristics of a trial to evaluate the new phosphate iron-based binder sucroferric oxyhydroxide in dialysis patients with the goal of advancing the practice of E.B.M. (EPISODE)

    Article • Clinical and Experimental Nephrology, March 2018, Springer Science + Business Media

    Hideki Fujii

  37. Newly Developed Rat Model of Chronic Kidney Disease–Mineral Bone Disorder

    Article • Journal of Atherosclerosis and Thrombosis, January 2018, Japan Atherosclerosis Society

    Hideki Fujii

  38. Effects of Lanthanum Carbonate on Coronary Artery Calcification and Cardiac Abnormalities After Initiating Hemodialysis

    Article • Calcified Tissue International, October 2017, Springer Science + Business Media

    Hideki Fujii

  39. Hypertension Induced by Tyrosine-Kinase Inhibitors for the Treatment of Renal Cell Carcinoma in Hemodialysis Patients: A Single-Center Experience and Review of the Literature

    Article • Therapeutic Apheresis and Dialysis, May 2017, Wiley

    Hideki Fujii

  40. A case of fibrillary glomerulonephritis with fibril deposition in the arteriolar wall and a family history of renal disease

    Article • Case Reports in Nephrology and Dialysis, April 2017, Karger Publishers

    Hideki Fujii

  41. Relationship between cardiac calcification and left ventricular hypertrophy in patients with chronic kidney disease at hemodialysis initiation

    Article • Heart and Vessels, March 2017, Springer Science + Business Media

    Hideki Fujii

  42. Comparison of the effects of novel vitamin D receptor analog VS-105 and paricalcitol on chronic kidney disease-mineral bone disorder in an experimental model of chronic kidney disease

    Article • The Journal of Steroid Biochemistry and Molecular Biology, March 2017, Elsevier

    Hideki Fujii

  43. Mineral metabolism and cardiovascular disease in CKD

    Article • Clinical and Experimental Nephrology, January 2017, Springer Science + Business Media

    Hideki Fujii

  44. Incidence and Risk Factors of Persistent Hyperparathyroidism After Kidney Transplantation

    Article • Transplantation Proceedings, January 2017, Elsevier

    Hideki Fujii

  45. The Effects of Plasma Exchange on Severe Vasculitis with Diffuse Alveolar Hemorrhage

    Article • Internal Medicine, January 2017, Japanese Society of Internal Medicine

    Hideki Fujii

  46. Serum FGF23 levels may not be associated with serum phosphate and 1,25-dihydroxyvitamin D levels in patients with Fanconi syndrome–induced hypophosphatemia

    Article • Clinical Kidney Journal, September 2016, Oxford University Press (OUP)

    Hideki Fujii

  47. A clinical evaluation of renal amyloidosis in the Japan renal biopsy registry: a cross-sectional study

    Article • Clinical and Experimental Nephrology, August 2016, Springer Science + Business Media

    Hideki Fujii

  48. Riser pattern is a predictor of kidney mortality among patients with chronic kidney disease

    Article • Clinical and Experimental Hypertension, July 2016, Taylor & Francis

    Hideki Fujii

  49. Two Cases of Hypophosphatemia with Increased Renal Phosphate Excretion in Legionella Pneumonia

    Article • Case Reports in Nephrology and Dialysis, March 2016, Karger Publishers

    Hideki Fujii

  50. Anti-oxidative effect of AST-120 on kidney injury after myocardial infarction

    Article • British Journal of Pharmacology, March 2016, Wiley

    Hideki Fujii

  51. Relationship Between Type of Hypertension and Renal Arteriolosclerosis in Chronic Glomerular Disease

    Article • Kidney and Blood Pressure Research, January 2016, Karger Publishers

    Hideki Fujii

  52. The Vitamin D Receptor Activator Maxacalcitol Provides Cardioprotective Effects in Diabetes Mellitus

    Article • Cardiovascular Drugs and Therapy, November 2015, Springer Science + Business Media

    Hideki Fujii

  53. Anti-oxidative effect of theβ-blocker carvedilol on diabetic nephropathy in non-obese type 2 diabetic rats

    Article • Clinical and Experimental Pharmacology and Physiology, August 2015, Wiley

    Hideki Fujii

  54. Pre-Transplant Erythropoiesis-Stimulating Agent Hypo-Responsiveness and Post-Transplant Anemia

    Article • Transplantation Proceedings, July 2015, Elsevier

    Hideki Fujii

  55. 22-Oxacalcitriol attenuates bone loss in nonobese type 2 diabetes

    Article • Bone, May 2015, Elsevier

    Hideki Fujii

  56. Effect of cinacalcet cessation on hyperparathyroidism in kidney transcaplant patients after long-term dialysis therapy

    Article • Clinical and Experimental Nephrology, March 2015, Springer Science + Business Media

    Hideki Fujii

  57. Clinical Characteristics of Very Elderly Patients at Hemodialysis Initiation

    Article • Internal Medicine, January 2015, Japanese Society of Internal Medicine

    Hideki Fujii

  58. Elevated Expression of Pentraxin 3 in Anti-neutrophil Cytoplasmic Antibody-associated Glomerulonephritis with Normal Serum C-reactive Protein

    Article • Internal Medicine, January 2015, Japanese Society of Internal Medicine

    Hideki Fujii

  59. Dietary phosphorus restriction by a standard low-protein diet decreased serum fibroblast growth factor 23 levels in patients with early and advanced stage chronic kidney disease

    Article • Clinical and Experimental Nephrology, March 2014, Springer Science + Business Media

    Hideki Fujii

  60. Renin-Angiotensin System Inhibitors Reduce Serum Asymmetric Dimethylarginine Levels and Oxidative Stress in Normotensive Patients with Chronic Kidney Disease

    Article • Nephron Extra, February 2014, Karger Publishers

    Hideki Fujii

  61. A case of parathyroid adenoma adjacent to the thoracic spine in a hemodialysis patient

    Article • Clinical Nephrology, January 2014, Dustri-Verlgag Dr. Karl Feistle

    Hideki Fujii

  62. Marked Elevation of Serum Hyaluronan Levels in Collagenofibrotic Glomerulopathy

    Article • Internal Medicine, January 2014, Japanese Society of Internal Medicine

    Hideki Fujii

  63. Vitamin D Activates the Nrf2-Keap1 Antioxidant Pathway and Ameliorates Nephropathy in Diabetic Rats

    Article • American Journal of Hypertension, September 2013, Oxford University Press (OUP)

    Hideki Fujii

  64. Clinical Practice Guideline for the Management of Chronic Kidney Disease-Mineral and Bone Disorder

    Article • Therapeutic Apheresis and Dialysis, June 2013, Wiley

    Hideki Fujii, Dr Hirotaka Komaba, Seiji Fukumoto

  65. Another role for nephrologists in disaster medicine

    Article • Clinical and Experimental Nephrology, February 2013, Springer Science + Business Media

    Hideki Fujii

  66. Anti-Oxidative Effect of Vitamin D Analog on Incipient Vascular Lesion in Non-Obese Type 2 Diabetic Rats

    Article • American Journal of Nephrology, January 2013, Karger Publishers

    Hideki Fujii

  67. Parathyroid Enlargement at Dialysis Initiation in Patients With Chronic Kidney Diseases

    Article • Therapeutic Apheresis and Dialysis, December 2012, Wiley

    Hideki Fujii

  68. Association between AST-120 and abdominal aortic calcification in predialysis patients with chronic kidney disease

    Article • Clinical and Experimental Nephrology, October 2012, Springer Science + Business Media

    Hideki Fujii

  69. Effect of enzyme replacement therapy on serum asymmetric dimethylarginine levels, coronary flow reserve and left ventricular hypertrophy in patients with Fabry disease

    Article • Clinical Kidney Journal, October 2012, Oxford University Press (OUP)

    Hideki Fujii

  70. Japanese Society for Dialysis Therapy Guidelines for Management of Cardiovascular Diseases in Patients on Chronic Hemodialysis

    Article • Therapeutic Apheresis and Dialysis, October 2012, Wiley

    Hideki Fujii

  71. Composition and plaque patterns of coronary culprit lesions and clinical characteristics of patients with chronic kidney disease

    Article • Kidney International, August 2012, Elsevier

    Hideki Fujii

  72. Mineral and bone disease - CKD 1-5

    Article • Nephrology Dialysis Transplantation, May 2012, Oxford University Press (OUP)

    Hideki Fujii

  73. Interpretation of the Association between Beta-Blockers and Hip/Femur Fracture

    Article • American Journal of Nephrology, January 2012, Karger Publishers

    Hideki Fujii

  74. Successful treatment of progressive renal injury due to granulomatous tubulointerstitial nephritis with uveitis

    Article • Clinical and Experimental Nephrology, June 2011, Springer Science + Business Media

    Hideki Fujii

  75. CKD / Mineral bone disease

    Article • Clinical Kidney Journal, June 2011, Oxford University Press (OUP)

    Hideki Fujii

  76. Progression & risk factors CKD 1-5 (1)

    Article • Clinical Kidney Journal, June 2011, Oxford University Press (OUP)

    Hideki Fujii

  77. Bone disease in CKD 1-5

    Article • Clinical Kidney Journal, June 2011, Oxford University Press (OUP)

    Hideki Fujii

  78. Comparison between Whole and Intact Parathyroid Hormone Assays

    Article • Therapeutic Apheresis and Dialysis, May 2011, Wiley

    Hideki Fujii

  79. Clinical Efficacy and Cost-Effectiveness of Lanthanum Carbonate as Second-Line Therapy in Hemodialysis Patients in Japan

    Article • Clinical Journal of the American Society of Nephrology, May 2011, American Society of Nephrology

    Hideki Fujii, Dr Hirotaka Komaba

  80. Uremic Toxins and Oral Adsorbents

    Article • Therapeutic Apheresis and Dialysis, March 2011, Wiley

    Hideki Fujii

  81. Role of Oxidative Stress and Indoxyl Sulfate in Progression of Cardiovascular Disease in Chronic Kidney Disease

    Article • Therapeutic Apheresis and Dialysis, January 2011, Wiley

    Hideki Fujii

  82. Clinical Characteristics and Cardiovascular Outcomes of Hemodialysis Patients with Atrial Fibrillation: A Prospective Follow-Up Study

    Article • American Journal of Nephrology, January 2011, Karger Publishers

    Hideki Fujii

  83. Effects of AST-120 on Left Ventricular Mass in Predialysis Patients

    Article • American Journal of Nephrology, January 2011, Karger Publishers

    Hideki Fujii

  84. Carvedilol Ameliorates Low-Turnover Bone Disease in Non-Obese Type 2 Diabetes

    Article • American Journal of Nephrology, January 2011, Karger Publishers

    Hideki Fujii

  85. Effect of Intravenous Saccharated Ferric Oxide on Serum FGF23 and Mineral Metabolism in Hemodialysis Patients

    Article • American Journal of Nephrology, January 2011, Karger Publishers

    Hideki Fujii, Dr Hirotaka Komaba

  86. The effects of the receptor for advanced glycation end products (RAGE) on bone metabolism under physiological and diabetic conditions

    Article • Endocrine, October 2010, Springer Science + Business Media

    Hideki Fujii, Dr Hirotaka Komaba

  87. Coronary Plaque Morphology Using Virtual Histology-Intravascular Ultrasound Analysis in Hemodialysis Patients

    Article • Therapeutic Apheresis and Dialysis, September 2010, Wiley

    Hideki Fujii

  88. Homocysteine and folic acid levels in hemodialysis patients treated with sevelamer hydrochloride

    Article • Clinical Nephrology, June 2010, Dustri-Verlgag Dr. Karl Feistle

    Hideki Fujii

  89. Association Between Indoxyl Sulfate and Skeletal Resistance in Hemodialysis Patients

    Article • Therapeutic Apheresis and Dialysis, March 2010, Wiley

    Hideki Fujii

  90. Contrast-induced ultrasonography with Levovist in a case of exercise-induced acute kidney injury without rhabdomyolysis

    Article • Clinical Nephrology, February 2010, Dustri-Verlgag Dr. Karl Feistle

    Hideki Fujii

  91. Depressed expression of Klotho and FGF receptor 1 in hyperplastic parathyroid glands from uremic patients

    Article • Kidney International, February 2010, Elsevier

    Hideki Fujii, Dr Hirotaka Komaba

  92. Oxidative and Nitrosative Stress and Progression of Diabetic Nephropathy in Type 2 Diabetes

    Article • American Journal of Nephrology, January 2010, Karger Publishers

    Hideki Fujii, Dr Hirotaka Komaba

  93. Marked increase in bone formation markers after cinacalcet treatment by mechanisms distinct from hungry bone syndrome in a haemodialysis patient

    Article • Clinical Kidney Journal, September 2009, Oxford University Press (OUP)

    Hideki Fujii

  94. Role of oxidative stress in diabetic bone disorder

    Article • Bone, July 2009, Elsevier

    Hideki Fujii

  95. Thioredoxin-1 overexpression in transgenic mice attenuates streptozotocin-induced diabetic osteopenia: A novel role of oxidative stress and therapeutic implications

    Article • Bone, May 2009, Elsevier

    Hideki Fujii

  96. Oral charcoal adsorbent (AST-120) prevents progression of cardiac damage in chronic kidney disease through suppression of oxidative stress

    Article • Nephrology Dialysis Transplantation, February 2009, Oxford University Press (OUP)

    Hideki Fujii

  97. Prevalence and Cardiovascular Features of Japanese Hemodialysis Patients with Fabry Disease

    Article • American Journal of Nephrology, January 2009, Karger Publishers

    Hideki Fujii

  98. The whole-PTH/intact-PTH ratio is a useful predictor of severity of secondary hyperparathyroidism

    Article • Clinical Kidney Journal, July 2008, Oxford University Press (OUP)

    Hideki Fujii, Dr Hirotaka Komaba

  99. Putative Role of Asymmetric Dimethylarginine in Microvascular Disease of Kidney and Heart in Hypertensive Patients

    Article • American Journal of Hypertension, June 2008, Oxford University Press (OUP)

    Hideki Fujii

  100. Serum Pro-hepcidin as an Indicator of Iron Status in Dialysis Patients

    Article • Therapeutic Apheresis and Dialysis, June 2008, Wiley

    Hideki Fujii, Dr Hirotaka Komaba

  101. Bone formation in spontaneously diabetic Torii-newly established model of non-obese type 2 diabetes rats

    Article • Bone, February 2008, Elsevier

    Hideki Fujii

  102. Putative Role of Endothelial Lipase in Dialysis Patients with Hypoalbuminemia and Inflammation

    Article • American Journal of Nephrology, January 2008, Karger Publishers

    Hideki Fujii

  103. Histomorphometric analysis of diabetic osteopenia in streptozotocin-induced diabetic mice: A possible role of oxidative stress

    Article • Bone, May 2007, Elsevier

    Hideki Fujii

  104. Tako-tsubo Cardiomyopathy Associated with Brain Metastasis of Seminoma in a Patient with Chronic Kidney Disease

    Article • Internal Medicine, January 2007, Japanese Society of Internal Medicine

    Hideki Fujii

  105. Relationship between Parathyroid Hormone and Cardiac Abnormalities in Chronic Dialysis Patients

    Article • Internal Medicine, January 2007, Japanese Society of Internal Medicine

    Hideki Fujii

  106. 透析患者における心房細動の臨床的特徴

    Article • Nihon Toseki Igakkai Zasshi, January 2007, Japanese Society for Dialysis Therapy

    Hideki Fujii

  107. Regulation of parathyroid function in chronic kidney disease (CKD)

    Article • Clinical and Experimental Nephrology, September 2006, Springer Science + Business Media

    Hideki Fujii

  108. Relationship between renal artery stenosis and intrarenal damage in autopsy subjects with stroke

    Article • Nephrology Dialysis Transplantation, September 2005, Oxford University Press (OUP)

    Hideki Fujii

  109. Normalization of reversed bio-intact-PTH(1-84)/intact- PTH ratio after parathyroidectomy in a patient with severe secondary hyperparathyroidism

    Article • Clinical Nephrology, July 2005, Dustri-Verlgag Dr. Karl Feistle

    Hideki Fujii

  110. Clinical Implications of Assessing Coronary Flow Velocity Reserve and Plasma Endothelin-1 in Hypertensive Patients

    Article • Hypertension Research, January 2005, Japanese Society of Hypertension

    Hideki Fujii

  111. Primary Aldosteronism Combined With Preclinical Cushing's Syndrome in an Elderly Patient

    Article • Circulation Journal, January 2005, Japanese Circulation Society

    Hideki Fujii

  112. Plasma asymmetric dimethylarginine and coronary and peripheral endothelial dysfunction in hypertensive patients

    Article • American Journal of Hypertension, September 2004, Oxford University Press (OUP)

    Hideki Fujii

  113. 1065-176 Role of endothelin-1 and coronary flow reserve in hypertensive patients without coronary artery disease

    Article • Journal of the American College of Cardiology, March 2004, Elsevier

    Hideki Fujii

  114. Carotid Intima-Media Thickness Is Correlated with Impairment of Coronary Flow Reserve in Hypertensive Patients without Coronary Artery Disease

    Article • Hypertension Research, January 2003, Japanese Society of Hypertension

    Hideki Fujii

  115. Budd-Chiari syndrome incidentally found by an abnormal shadow on chest X-ray.

    Article • Nihon Naika Gakkai Zasshi, January 2002, Japanese Society of Internal Medicine

    Hideki Fujii