Japanese-Style Dietary Patterns, Mortality, and Selected Cancer Outcomes in Japanese Populations: A Systematic Review Integrating Meta-Analysis, Food-Group Loading Visualization, and Qualitative Synthesis.

Tao Yu, Marina Yamagishi, Kota Okoshi, Shuhei Nomura, Naoko Yamamoto, Shoichiro Tsugane

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In one paragraph

Review in Advances in nutrition (Bethesda, Md.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Tao YuDepartment of Food, Nutrition and Health, Graduate School of Public Health, International University of Health and Welfare, Tokyo, Japan; R&D Division, Meiji Co., Ltd., Tokyo, Japan. Electronic address: yu-tao-cp@ihwg.jp.

Marina YamagishiDepartment of Food, Nutrition and Health, Graduate School of Public Health, International University of Health and Welfare, Tokyo, Japan.

Kota OkoshiDepartment of Food, Nutrition and Health, Graduate School of Public Health, International University of Health and Welfare, Tokyo, Japan; Wellness Solution Development Center, Institute of Food Sciences and Technologies, Ajinomoto Co., Inc., Kanagawa, Japan.

Shuhei NomuraDepartment of Food, Nutrition and Health, Graduate School of Public Health, International University of Health and Welfare, Tokyo, Japan; Department of Health Policy and Management, School of Medicine, Keio University, Tokyo, Japan; Global Health Policy Lab, International Research Institute of Disaster Science, Tohoku University, Miyagi, Japan.

Naoko YamamotoDepartment of Food, Nutrition and Health, Graduate School of Public Health, International University of Health and Welfare, Tokyo, Japan.

Shoichiro TsuganeDepartment of Food, Nutrition and Health, Graduate School of Public Health, International University of Health and Welfare, Tokyo, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Japanese-style dietary patterns (DPs) are often regarded as healthy, but the food-group combinations needed to develop health-oriented Japanese-style DPs remain unclear. This systematic review synthesized associations between predefined (a priori) Japanese-style DPs and health outcomes in Japanese populations and used data-derived (a posteriori) DPs to examine outcome-specific heterogeneity in food-group composition and loadings. PubMed/MEDLINE and Web of Science Core Collection were searched for observational studies. Random-effects meta-analyses were conducted for comparable a priori Japanese-style DPs using adjusted hazard ratios (HRs) comparing the highest and lowest score categories. A posteriori DPs derived by principal component analysis or factor analysis were visualized using reported estimates, investigator-assigned pattern names, relative similarity to the Japanese Diet Index-9 (JDI-9) reference profile, and food-group loadings. Of 37 reports retained in the review, 12 longitudinal reports contributed to meta-analyses or food-group loading visualizations, and 25 were synthesized qualitatively. Across 3 independent studies contributing 5 analytic estimates per outcome, pooled HRs comparing the highest and lowest score categories suggested lower all-cause mortality [HR: 0.88; 95% confidence interval (CI): 0.83, 0.93; I

Indexed as

a posteriori dietary patternsa priori dietary patternscardiovascular mortalitycolorectal cancerfood structuregastric cancerJapanese dietJapanese Diet Indexmeta-analysisWashoku

Identifiers

PMID42880456

DOI10.1016/j.advnut.2026.100756

PMCPMC13756781

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