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T. Kusama · SciRah

Researcher profile · Semantic Scholar

T. Kusama

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T. Kusama — researcher profile on SciRah

h-index: 16
Works: 84
Citations: 702

Most-cited papers

The deterioration of oral function and orofacial appearance mediated the relationship between tooth loss and depression among community-dwelling older adults: A JAGES cohort study using causal mediation analysis.
T. Kusama, S. Kiuchi, N. Umehara, K. Kondo +2 more
2021Journal of Affective Disorders49 citations Open access
Semantic Scholar
Infrequent Denture Cleaning Increased the Risk of Pneumonia among Community-dwelling Older Adults: A Population-based Cross-sectional Study
T. Kusama, J. Aida, Tatsuo Yamamoto, K. Kondo +1 more
2019Scientific Reports41 citations Open access
Semantic Scholar
Oral Status and Dementia Onset: Mediation of Nutritional and Social Factors
S. Kiuchi, U. Cooray, T. Kusama, T. Yamamoto +5 more
2021Journal of dentistry research40 citations
Semantic Scholar
Free Sugar Intake and Periodontal Diseases: A Systematic Review
T. Kusama, N. Nakazawa, K. Takeuchi, S. Kiuchi +1 more
2022Nutrients30 citations Open access
Semantic Scholar
Weight Loss Mediated the Relationship between Tooth Loss and Mortality Risk
T. Kusama, K. Takeuchi, S. Kiuchi, J. Aida +2 more
2022Journal of dentistry research28 citations
Semantic Scholar
Dental prosthetic treatment reduced the risk of weight loss among older adults with tooth loss
T. Kusama, N. Nakazawa, S. Kiuchi, K. Kondo +2 more
2021Journal of The American Geriatrics Society28 citations
Semantic Scholar
Longitudinal Association Between Oral Status and Cognitive Decline Using Fixed-effects Analysis
S. Kiuchi, T. Kusama, Kemmyo Sugiyama, Takafumi Yamamoto +5 more
2021Journal of Epidemiology26 citations Open access
Semantic Scholar
Poor oral health and dementia risk under time‐varying confounding: A cohort study based on marginal structural models
T. Kusama, K. Takeuchi, S. Kiuchi, J. Aida +1 more
2023Journal of The American Geriatrics Society24 citations
Semantic Scholar
Large contribution of oral status for death among modifiable risk factors in older adults: the JAGES prospective cohort study.
N. Nakazawa, T. Kusama, U. Cooray, Takafumi Yamamoto +6 more
2022The journals of gerontology. Series A, Biological sciences and medical sciences24 citations
Semantic Scholar
Heated Tobacco Products Have Reached Younger or More Affluent People in Japan
Ayaka Igarashi, J. Aida, T. Kusama, T. Tabuchi +4 more
2020Journal of Epidemiology24 citations Open access
Semantic Scholar
Information Usage and Compliance with Preventive Behaviors for COVID-19: A Longitudinal Study with Data from the JACSIS 2020/JASTIS 2021
T. Kusama, S. Kiuchi, K. Takeuchi, Takaaki Ikeda +4 more
2022Healthcare22 citations Open access
Semantic Scholar
Does the Type of Temporary Housing Make a Difference in Social Participation and Health for Evacuees of the Great East Japan Earthquake and Tsunami? A Cross-Sectional Study
T. Kusama, J. Aida, Kemmyo Sugiyama, Y. Matsuyama +6 more
2018Journal of Epidemiology20 citations Open access
Semantic Scholar
Dental prosthesis use is associated with higher protein intake among older adults with tooth loss
T. Kusama, K. Takeuchi, S. Kiuchi, J. Aida +4 more
2023Journal of Oral Rehabilitation19 citations Open access
Semantic Scholar
Oral Hypofunction and Risk of Weight Change among Independent Older Adults
Chihiro Shiota, T. Kusama, K. Takeuchi, S. Kiuchi +1 more
2023Nutrients18 citations Open access
Semantic Scholar
Oral status and incident functional disability: A 9-year prospective cohort study from the JAGES.
Kinumi Yamamoto-Kuramoto, S. Kiuchi, K. Takeuchi, T. Kusama +5 more
2023Archives of gerontology and geriatrics (Print)17 citations Open access
Semantic Scholar
The association between socioeconomic status and reactions to radiation exposure: a cross-sectional study after the Fukushima Daiichi nuclear power station accident
T. Kusama, J. Aida, T. Tsuboya, Kemmyo Sugiyama +3 more
2018PLoS ONE16 citations Open access
Semantic Scholar
Potential complications of CAD/CAM-produced resin composite crowns on molars: A retrospective cohort study over four years
Miyu Inomata, A. Harada, S. Kasahara, T. Kusama +3 more
2022PLoS ONE15 citations Open access
Semantic Scholar
A 19-Year Study of Dental Needlestick and Sharps Injuries in Japan
Yoko Iwamatsu-Kobayashi, J. Watanabe, T. Kusama, H. Endo +4 more
2022International Dental Journal15 citations Open access
Semantic Scholar
Validity of claims-based definition of number of remaining teeth in Japan: Results from the Longevity Improvement and Fair Evidence Study
Y. Tamada, T. Kusama, Sachiko Ono, M. Maeda +4 more
2024PLoS ONE13 citations Open access
Semantic Scholar
Exploring the relationship between oral health and multiple health conditions: An outcome-wide approach.
Shiho Kino, Y. Tamada, K. Takeuchi, A. Nakagomi +4 more
2023Journal of Prosthodontic Research13 citations Open access
Semantic Scholar
Number of Teeth and Dementia-free Life Expectancy: A 10-Year Follow-Up Study From the Japan Gerontological Evaluation Study.
S. Kiuchi, Y. Matsuyama, K. Takeuchi, T. Kusama +3 more
2024Journal of the American Medical Directors Association12 citations Open access
Semantic Scholar
Does public transportation reduce inequalities in access to dental care among older adults? Japan Gerontological Evaluation Study.
S. Kiuchi, J. Aida, T. Kusama, Takafumi Yamamoto +4 more
2019Community Dentistry and Oral Epidemiology12 citations
Semantic Scholar
Compliance Trajectory and Patterns of COVID-19 Preventive Measures, Japan, 2020–2022
T. Kusama, K. Takeuchi, Y. Tamada, S. Kiuchi +2 more
2023Emerging Infectious Diseases11 citations Open access
Semantic Scholar
Integrating lipid metabolite analysis with MRI-based transformer and radiomics for early and late stage prediction of oral squamous cell carcinoma
Wen Li, Yang Li, Shiyu Gao, Nengwen Huang +5 more
2024BMC Cancer10 citations Open access
Semantic Scholar
Dental prosthesis use moderates association between tooth loss and risk of depressive symptoms in older adults with severe tooth loss: The JAGES cohort trial.
N. Nakazawa, K. Takeuchi, T. Kusama, S. Kiuchi +2 more
2024Journal of Prosthodontic Research10 citations Open access
Semantic Scholar
Is the Association between Green Tea Consumption and the Number of Remaining Teeth Affected by Social Networks?: A Cross-Sectional Study from the Japan Gerontological Evaluation Study Project
Manami Hoshi, J. Aida, T. Kusama, Takafumi Yamamoto +5 more
2020International Journal of Environmental Research and Public Health10 citations Open access
Semantic Scholar
Association of poor dental status with eating alone: A cross-sectional Japan gerontological evaluation study among independent older adults.
Anna Kinugawa, T. Kusama, Takafumi Yamamoto, S. Kiuchi +4 more
2021Appetite9 citations Open access
Semantic Scholar
Childhood Socioeconomic Status Affects Dental Pain in Later Life
T. Yamamoto, U. Cooray, T. Kusama, S. Kiuchi +4 more
2024JDR Clinical & Translational Research8 citations
Semantic Scholar
Majority of New Onset of Dental Caries Occurred from Caries-Free Students: A Longitudinal Study in Primary School Students
T. Kusama, H. Todoriki, K. Osaka, J. Aida
2020International Journal of Environmental Research and Public Health8 citations Open access
Semantic Scholar
Differences in prevalence of self-reported oral hypofunction between older adult patients with rheumatoid arthritis and the general older population: A cross-sectional study using propensity score matching.
Yoko Kudo, K. Takeuchi, T. Kusama, T. Kojima +6 more
2024Journal of Oral Rehabilitation7 citations Open access
Semantic Scholar
Association between dietary pattern and insomnia symptoms among independent older adults: A cross-sectional study based on JAGES
Anna Kinugawa, T. Kusama, K. Takeuchi, J. Aida +6 more
2023Sleep Medicine7 citations Open access
Semantic Scholar
Oral Frailty as a Predictor for Weight Loss in Older Japanese: A Cohort Study
K. Wang, Y. Matsuyama, S. Kiuchi, T. Kusama +1 more
2025Journal of dentistry research6 citations
Semantic Scholar
Periodontal Care Is Associated With a Lower Risk of Dialysis Initiation in Middle‐Aged Patients With Type 2 Diabetes Mellitus: A 6‐Year Follow‐Up Cohort Study Based on a Nationwide Healthcare Database
T. Kusama, Y. Tamada, K. Osaka, Kenji Takeuch
2025Journal of Clinical Periodontology6 citations Open access
Semantic Scholar
Socioeconomic Inequalities in Oral Frailty Among Older Adults: A Causal Mediation Analysis on the Role of Prevention From Tooth Loss
M. Fujita, K. Takeuchi, Y. Tamada, T. Kusama +3 more
2025Journal of Oral Rehabilitation6 citations
Semantic Scholar
The association between objective and subjective oral health conditions and the presence of anorexia of aging among Japanese older Adults1.
T. Kusama, K. Takeuchi, S. Kiuchi, J. Aida +1 more
2024Appetite6 citations Open access
Semantic Scholar
Lower socio-economic status in adolescence is associated with poor oral health at an older age: Mediation by social and behavioural factors.
Kinumi Yamamoto-Kuramoto, T. Kusama, S. Kiuchi, K. Kondo +3 more
2023Gerodontology6 citations
Semantic Scholar
Reduced number of teeth with and without dental prostheses and low frequency of laughter in older adults: Mediation by poor oral function.
Y. Tamada, K. Takeuchi, T. Kusama, M. Saito +6 more
2023Journal of Prosthodontic Research6 citations Open access
Semantic Scholar
Combined association of social isolation and loneliness with frailty onset among independent older adults: A JAGES cohort study.
Mamoru Sato, Manami Hoshi-Harada, K. Takeuchi, T. Kusama +5 more
2025Archives of gerontology and geriatrics (Print)5 citations Open access
Semantic Scholar
Removable partial denture, complete denture, and fixed partial denture use and health-related quality of life among older adults with tooth loss: A JAGES cross-sectional study.
Manami Hoshi-Harada, K. Takeuchi, T. Kusama, J. Aida +2 more
2025Journal of Prosthodontic Research5 citations Open access
Semantic Scholar
Bivalent mRNA vaccine effectiveness against COVID-19 among older adults in Japan: a test-negative study from the VENUS study
Y. Tamada, K. Takeuchi, T. Kusama, M. Maeda +3 more
2024BMC Infectious Diseases5 citations Open access
Semantic Scholar
Differences in Cumulative Long-Term Care Costs by Dental Visit Pattern Among Japanese Older Adults: The JAGES Cohort Study
S. Kiuchi, K. Takeuchi, M. Saito, T. Kusama +5 more
2024The journals of gerontology. Series A, Biological sciences and medical sciences5 citations Open access
Semantic Scholar
Longitudinal association between posterior occlusal contact and dementia development in a large retrospective cohort study using a Japanese claims database
Takashi Miyano, Y. Tamada, T. Kusama, K. Osaka +1 more
2024Scientific Reports5 citations Open access
Semantic Scholar
Co-Payments and Inequality in Gingival Bleeding and Dental Visits
N. Nakazawa, T. Kusama, K. Takeuchi, S. Kiuchi +4 more
2023International Dental Journal5 citations Open access
Semantic Scholar
Tooth loss, dental prosthesis use, and cause-specific mortality in older Japanese adults: a 7-year cohort study
Faiz Abdurrahman, T. Kusama, Y. Tamada, S. Kiuchi +6 more
2025Scientific Reports4 citations Open access
Semantic Scholar
Impact of posterior occlusal contact loss on cardiovascular disease using a Japanese claims database
Takashi Miyano, Y. Tamada, T. Kusama, K. Osaka +1 more
2025Scientific Reports4 citations Open access
Semantic Scholar
Public Periodontal Screening Increases Subsequent Regular Dental Visits: The Life Study
Y. Tamada, T. Kusama, M. Maeda, F. Murata +3 more
2024JDR Clinical & Translational Research4 citations
Semantic Scholar
Does online communication mitigate the association between a decrease in face-to-face communication and laughter during the COVID-19 pandemic? A cross-sectional study from JACSIS study
S. Kiuchi, K. Takeuchi, T. Kusama, U. Cooray +3 more
2023Preventive medicine reports4 citations Open access
Semantic Scholar
Chewing difficulty, swallowing problems, xerostomia and cause‐specific mortality among older adults: A 7‐year follow‐up JAGES cohort study
T. Kusama, Y. Tamada, S. Kiuchi, M. Saito +5 more
2025Geriatrics & Gerontology International3 citations Open access
Semantic Scholar
Bidirectional longitudinal associations between subjective oral health and subjective well-being.
T. Kusama, Takamasa Komiyama, K. Takeuchi, Wael Sabbah +2 more
2024Archives of gerontology and geriatrics (Print)3 citations Open access
Semantic Scholar
Tooth loss mediates the association between smoking and an increased risk of dementia among older adults: The JAGES prospective cohort study
T. Kusama, K. Takeuchi, S. Kiuchi, Y. Tamada +2 more
2024Journal of Clinical Periodontology3 citations Open access
Semantic Scholar

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S. Kiuchi×30
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S. Kiuchi — researcher profile on SciRah
K. Osaka×30
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K. Takeuchi×20
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K. Takeuchi — researcher profile on SciRah
J. Aida×19
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Y. Tamada — researcher profile on SciRah

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K. Osaka — researcher profile on SciRah

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N. Nakazawa×10

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Takafumi Yamamoto×9

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Takafumi Yamamoto — researcher profile on SciRah

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Tatsuo Yamamoto×6

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Tatsuo Yamamoto — researcher profile on SciRah