Nankaku A, Yamaoka Y, Shiomi A, Kagawa H, Manabe S, Oishi T, Tone K, Notsu A, Kinugasa Y. Lavage cytology diagnosed by immunostaining may be a poor prognostic factor in pathological stage III colorectal cancer. Annals of gastroenterological surgery. 2025.03; 9 (2): 271-280. ( PubMed, DOI )

Khin YP, Nawa N, Yamaoka Y, Owusu FM, Abe A, Fujiwara T. Association between elementary and middle school children with mixed/foreign parents and influenza vaccination in Japan. Pediatrics international : official journal of the Japan Pediatric Society. 2025.01; 67 (1): e15851. ( PubMed, DOI )

Yu Par Khin , Nawa Nobutoshi, Yamaoka Yui, Owusu Floret Maame, Abe Aya, Fujiwara Takeo. 日本における混血/外国人の両親を持つ小中学生とインフルエンザ予防接種との関連性(Association between elementary and middle school children with mixed/foreign parents and influenza vaccination in Japan) Pediatrics International. 2025; 67 (1): ped.15851. ( ichushi )

Kasai S, Kagawa H, Hatakeyama K, Shiomi A, Manabe S, Yamaoka Y, Tanaka Y, Igaki T, Nagashima T, Ohshima K, Urakami K, Akiyama Y, Kinugasa Y, Yamaguchi K. Molecular profiling of risk factors for relapse in Japanese patients with stage II colorectal cancer: a retrospective cohort study. International journal of clinical oncology. 2024.12; 29 (12): 1887-1895. ( PubMed, DOI )

Koyama Y*, Yamaoka Y, Nishimura H, Kuramochi J, Fujiwara T. More adverse childhood experiences are associated with increased social thinning and severe psychological distress. Commun Psychol. 2024.10; 2 (1): 94. ( PubMed, DOI )

Yamaoka Y, Hangai M, Sampei M, Morisaki N. The Associations Between COVID-19-related Stigma of School-age Children and Communicative Support from Parents and Teachers. J Child Fam Stud. 2024.10; 33 3574-3587. ( DOI )

Yamaguchi A, Bethell CD, Yamaoka Y, Morisaki N. How listening to children impacts their quality of life: a cross-sectional study of school-age children during the COVID-19 pandemic in Japan. BMJ paediatrics open. 2024.10; 8 (1): ( PubMed, DOI )

Yamaoka Y, Ochi M, Fukui M, Isumi A, Doi S, Fujiwara T, Nawa N. Home visitors' needs and perceptions of the benefits of a home visiting program for childcare support in Japan: A qualitative study of home visitors. Child abuse & neglect. 2024.07; 153 106853. ( PubMed, DOI )

Terada S, Isumi A, Yamaoka Y, Fujiwara T. Years of education mediate the association between adverse childhood experiences and unintended pregnancy: A population-based study in Japan. Child abuse & neglect. 2024.07; 153 106817. ( PubMed, DOI )

Kasai S, Kagawa H, Shiomi A, Hino H, Manabe S, Yamaoka Y, Maeda C, Tanaka Y, Kinugasa Y. Incidence and risk factors for perineal hernia after robotic abdominoperineal resection: a single-center, retrospective cohort study. Techniques in coloproctology. 2024.07; 28 (1): 79. ( PubMed, DOI )

Furukawa S, Nawa N, Yamaoka Y, Fujiwara T. Concerns and needs of people with intellectual disabilities and their caregivers during the COVID-19 pandemic in Japan. Journal of intellectual disabilities : JOID. 2024.03; 28 (1): 137-156. ( PubMed, DOI )

Doi SK, Isumi A, Yamaoka Y, Shakagori S, Yamazaki J, Ito K, Shiomi M, Sumioka H, Fujiwara T. The effect of breathing relaxation to improve poor sleep quality in adults using a huggable human-shaped device: a randomized controlled trial. Sleep & breathing = Schlaf & Atmung. 2024.03; 28 (1): 429-439. ( PubMed, DOI )

Khin YP, Yamaoka Y, Abe A, Fujiwara T. Association of child-specific and household material deprivation with depression among elementary and middle school students in Japan. Social psychiatry and psychiatric epidemiology. 2024.02; 59 (2): 329-339. ( PubMed, DOI )

Kasai S, Hino H, Hatakeyama K, Shiomi A, Kagawa H, Manabe S, Yamaoka Y, Nagashima T, Ohshima K, Urakami K, Akiyama Y, Notsu A, Kinugasa Y, Yamaguchi K. Risk factors for lateral lymph node metastasis based on the molecular profiling of rectal cancer. Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland. 2024.01; 26 (1): 45-53. ( PubMed, DOI )

Shibata T, Yamaoka Y, Nawa N, Nishimura H, Koyama Y, Kuramochi J, Fujiwara T. Association of lifestyle and flourishing during the COVID-19 pandemic in Japan. Frontiers in psychology. 2024; 15 1341711. ( PubMed, DOI )

Osako M, Yamaoka Y, Mochizuki Y, Fujiwara T. Role of primary care for individuals with childhood-onset neurologic conditions. Health care transitions. 2024; 2 100037. ( PubMed, DOI )

Arai S, Yamaoka Y, Shiomi A, Kagawa H, Hino H, Manabe S, Chen K, Nanishi K, Maeda C, Notsu A, Kinugasa Y. Efficacy of laparoscopic surgery for loop colostomy: a propensity-score-matched analysis. Techniques in coloproctology. 2023.12; 27 (12): 1319-1326. ( PubMed, DOI )

Nishimura H, Nawa N, Yamaoka Y, Koyama Y, Kuramochi J, Fujiwara T. Association between residential greenness and severe psychological distress and the moderating role of 'stay-at-home' status: a population-based cross-sectional study during the COVID-19 pandemic in Japan. BMJ public health. 2023.11; 1 (1): e000093. ( PubMed, DOI )

Matsukura, H; Yamaoka, Y; Matsuyama, Y; Kondo, K; Fujiwara, T. Association between adverse childhood experiences and marital status among Japanese older adults CHILD ABUSE & NEGLECT. 2023.10; 144 106340. ( PubMed, DOI )

Tani Y, Matsuyama Y, Yamaoka Y, Matsukura H, Kawahara T, Fujiwara T. Change of human flourishing during the COVID-19 pandemic in Japan: Results from population-based U-CORONA study. SSM - population health. 2023.09; 23 101430. ( PubMed, DOI )

Kasai S, Kagawa H, Shiomi A, Hino H, Manabe S, Yamaoka Y, Chen K, Nanishi K, Maeda C, Kinugasa Y. Long-term outcomes of upfront robotic rectal cancer surgery: a single-center, retrospective cohort study in Japan. Surgery today. 2023.09; 53 (9): 1028-1037. ( PubMed, DOI )

Osako M, Yamaoka Y, Takeuchi C, Mochizuki Y, Fujiwara T. Health care transition for cerebral palsy with intellectual disabilities: A systematic review. Revue neurologique. 2023.06; 179 (6): 585-598. ( PubMed, DOI )

Hanaoka M, Kagawa H, Shiomi A, Hino H, Manabe S, Yamaoka Y, Kinugasa Y. Risk factors for and longitudinal course of male sexual dysfunction after robotic rectal cancer surgery. Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland. 2023.05; 25 (5): 932-942. ( PubMed, DOI )

Osako M, Yamaoka Y, Takeuchi C, Fujiwara T, Mochizuki Y. Benefits and Challenges of Pediatric-to-Adult Health Care Transition in Childhood-Onset Neurologic Conditions. Neurology. Clinical practice. 2023.04; 13 (2): e200130. ( PubMed, DOI )

Wakai H, Nawa N, Yamaoka Y, Fujiwara T. Stressors and coping strategies among single mothers during the COVID-19 pandemic. PloS one. 2023; 18 (3): e0282387. ( PubMed, DOI )

Yamaoka Y, Doi S, Isumi A, Fujiwara T. Health and social relationships of mothers of children in special education schools. Research in developmental disabilities. 2022.12; 131 104374. ( PubMed, DOI )

Goto R, Piedvache A, Hangai M, Yamaoka Y, Sampei M, Sawada N, Okubo Y, Tanaka K, Morisaki N, Hosozawa M. Time trends in emotional well-being and self-esteem in children and adolescents during the COVID-19 pandemic. Child and adolescent psychiatry and mental health. 2022.11; 16 (1): 89. ( PubMed, DOI )

Kojima T, Hino H, Shiomi A, Kagawa H, Yamaoka Y, Manabe S, Chen K, Nanishi K, Yamauchi S, Sugihara K. Long-term outcomes of D2 vs. D3 lymph node dissection for cT2N0M0 colorectal cancer: a multi‑institutional retrospective analysis. International journal of clinical oncology. 2022.11; 27 (11): 1717-1724. ( PubMed, DOI )

Kashiwabara T, Fujiwara T, Doi S, Yamaoka Y. Association between Hope for the Future and Academic Performance in Adolescents: Results from the K-CHILD Study. International journal of environmental research and public health. 2022.09; 19 (19): ( PubMed, DOI )

Katz I, Priolo-Filho S, Katz C, Andresen S, Bérubé A, Cohen N, Connell CM, Collin-Vézina D, Fallon B, Fouche A, Fujiwara T, Haffejee S, Korbin JE, Maguire-Jack K, Massarweh N, Munoz P, Tarabulsy GM, Tiwari A, Truter E, Varela N, Wekerle C, Yamaoka Y. One year into COVID-19: What have we learned about child maltreatment reports and child protective service responses? Child abuse & neglect. 2022.08; 130 (Pt 1): 105473. ( PubMed, DOI )

Koyama Y, Nawa N, Yamaoka Y, Nishimura H, Kuramochi J, Fujiwara T. Association between Social Engagements and Stigmatization of COVID-19 Infection among Community Population in Japan. International journal of environmental research and public health. 2022.07; 19 (15): ( PubMed, DOI )

Hanaoka M, Hino H, Shiomi A, Kagawa H, Manabe S, Yamaoka Y, Kato S, Yamauchi S, Kinugasa Y, Sugihara K. The Eastern Cooperative Oncology Group Performance Status as a prognostic factor of stage I-III colorectal cancer surgery for elderly patients: a multi-institutional retrospective analysis. Surgery today. 2022.07; 52 (7): 1081-1089. ( PubMed, DOI )

Yamaoka Yui, Obikane Erika, Isumi Aya, Miyasaka Mikiko, Fujiwara Takeo. 千葉市における虐待による頭部外傷による入院の発生率(Incidence of hospitalization for abusive head trauma in Chiba City, Japan) Pediatrics International. 2022.06; 64 (1): ped.14903. ( ichushi )

Tai SY, Cheon S, Yamaoka Y, Chien YW, Lu TH. Changes in the rankings of leading causes of death in Japan, Korea, and Taiwan from 1998 to 2018: a comparison of three ranking lists. BMC public health. 2022.05; 22 (1): 926. ( PubMed, DOI )

Kasai S, Kagawa H, Shiomi A, Hino H, Manabe S, Yamaoka Y, Kato S, Hanaoka M, Kinugasa Y. Advantages of robotic abdominoperineal resection compared with laparoscopic surgery: a single-center retrospective study. Surgery today. 2022.04; 52 (4): 643-651. ( PubMed, DOI )

Motegi N, Yamaoka Y, Moriichi A, Morisaki N. Causes of death in patients with Down syndrome in 2014-2016: A population study in Japan. American journal of medical genetics. Part A. 2022.01; 188 (1): 224-236. ( PubMed, DOI )

Yamaguchi, A; Hosozawa, M; Hasegawa, A; Okubo, Y; Sampei, M; Sawada, N; Piedvache, A; Morisaki, N; Hangai, M; Tanaka, K; Yamaoka, Y. The coronavirus disease 2019 pandemic and the rights of the child in Japan PEDIATRICS INTERNATIONAL. 2022.01; 64 (1): e14913. ( PubMed, DOI )

Yamaoka Y, Obikane E, Isumi A, Miyasaka M, Fujiwara T. Incidence of hospitalization for abusive head trauma in Chiba City, Japan. Pediatrics international : official journal of the Japan Pediatric Society. 2022.01; 64 (1): e14903. ( PubMed, DOI )

Hangai M, Piedvache A, Sawada N, Okubo Y, Sampei M, Yamaoka Y, Tanaka K, Hosozawa M, Morisaki N, Igarashi T. Children's daily lives and well-being: Findings from the CORONA-CODOMO survey 1st wave. Pediatrics international : official journal of the Japan Pediatric Society. 2022.01; 64 (1): e14981. ( PubMed, DOI )

Kasai S, Shiomi A, Kagawa H, Hino H, Manabe S, Yamaoka Y, Chen K, Nanishi K, Kinugasa Y. The Effectiveness of Machine Learning in Predicting Lateral Lymph Node Metastasis From Lower Rectal Cancer: A Single Center Development and Validation Study. Annals of gastroenterological surgery. 2022.01; 6 (1): 92-100. ( PubMed, DOI )

Yamaguchi Arisa, Hosozawa Mariko, Hasegawa Ayaka, Okubo Yusuke, Sampei Makiko, Sawada Naomi, Piedvache Aurelie, Morisaki Naho, Hangai Mayumi, Tanaka Kyoko, Yamaoka Yui. 【子どもの権利条約採択30周年記念】日本における新型コロナウイルス感染症パンデミックおよび小児の権利(【The 30th Anniversary of the Convention on the Rights of the Child】The coronavirus disease 2019 pandemic and the rights of the child in Japan) Pediatrics International. 2022; 64 (1): ped.14913. ( ichushi )

Hangai Mayumi, Piedvache Aurelie, Sawada Naomi, Okubo Yusuke, Sampei Makiko, Yamaoka Yui, Tanaka Kyoko, Hosozawa Mariko, Morisaki Naho, Igarashi Takashi. 子どもたちの日常生活とウェルビーイング　コロナ×こどもアンケート第1回の調査結果(Children's daily lives and well-being: Findings from the CORONA-CODOMO survey 1st wave) Pediatrics International. 2022; 64 (1): ped.14981. ( ichushi )

Arai Y, Yamaoka Y, Morioka S. Sweeping Up Dying Cells during Tissue Injury. Nephron. 2022; 146 (3): 249-252. ( PubMed, DOI )

Yamaoka Y, Isumi A, Doi S, Fujiwara T. Association between Children's Engagement in Community Cultural Activities and Their Mental Health during the COVID-19 Pandemic: Results from A-CHILD Study. International journal of environmental research and public health. 2021.12; 18 (24): ( PubMed, DOI )

Imai K, Hotta K, Ito S, Yamaguchi Y, Kishida Y, Yamaoka Y, Manabe S, Hino H, Kagawa H, Yamaguchi T, Shiomi A, Kinugasa Y, Mori K, Ono H. Small-Dose Endoscopic Tattooing Using a Novel Needle for Localization Prior to Laparoscopic Surgery of Colorectal Cancer. Digestive diseases and sciences. 2021.12; 66 (12): 4448-4456. ( PubMed, DOI )

Yamaoka Y, Isumi A, Doi S, Ochi M, Fujiwara T. Differential Effects of Multiple Dimensions of Poverty on Child Behavioral Problems: Results from the A-CHILD Study. International journal of environmental research and public health. 2021.11; 18 (22): ( PubMed, DOI )

Yamaoka Y, Hosozawa M, Sampei M, Sawada N, Okubo Y, Tanaka K, Yamaguchi A, Hangai M, Morisaki N. Abusive and positive parenting behavior in Japan during the COVID-19 pandemic under the state of emergency. Child abuse & neglect. 2021.10; 120 105212. ( PubMed, DOI )

Kasai S, Hino H, Shiomi A, Kagawa H, Manabe S, Yamaoka Y, Kato S, Hanaoka M, Kinugasa Y. Robotic-assisted surgery for rectal cancer with situs inversus totalis: A case report. Asian journal of endoscopic surgery. 2021.10; 14 (4): 803-806. ( PubMed, DOI )

Hanaoka M, Hino H, Shiomi A, Kagawa H, Manabe S, Yamaoka Y, Kato S, Kinugasa Y. Minimally invasive surgery for colorectal cancer with persistent descending mesocolon: radiological findings and short-term outcomes. Surgical endoscopy. 2021.06; 35 (6): 2797-2804. ( PubMed, DOI )

Nawa Nobutoshi, Kuramochi Jin, Sonoda Shiro, Yamaoka Yui, Nukui Yoko, Miyazaki Yasunari, Fujiwara Takeo. 2020年の初回流行後の宇都宮市におけるSARS-CoV-2の血清有病率(Seroprevalence of SARS-CoV-2 in Utsunomiya City, Greater Tokyo, after the first pandemic in 2020) Journal of General and Family Medicine. 2021.05; 22 (3): 160-162. ( ichushi )

Nawa N, Kuramochi J, Sonoda S, Yamaoka Y, Nukui Y, Miyazaki Y, Fujiwara T. Seroprevalence of SARS-CoV-2 in Utsunomiya City, Greater Tokyo, after the first pandemic in 2020. Journal of general and family medicine. 2021.05; 22 (3): 160-162. ( PubMed, DOI )

Koyama Y, Nawa N, Yamaoka Y, Nishimura H, Sonoda S, Kuramochi J, Miyazaki Y, Fujiwara T. Interplay between social isolation and loneliness and chronic systemic inflammation during the COVID-19 pandemic in Japan: Results from U-CORONA study. Brain, behavior, and immunity. 2021.05; 94 51-59. ( PubMed, DOI )

Nawa N, Yamaoka Y, Koyama Y, Nishimura H, Sonoda S, Kuramochi J, Miyazaki Y, Fujiwara T. Association between Social Integration and Face Mask Use Behavior during the SARS-CoV-2 Pandemic in Japan: Results from U-CORONA Study. International journal of environmental research and public health. 2021.04; 18 (9): ( PubMed, DOI )

Yamaoka Y, Kagawa H, Shiomi A, Yamakawa Y, Hino H, Manabe S, Kinugasa Y. Robotic-assisted surgery may be a useful approach to protect urinary function in the modern era of diverse surgical approaches for rectal cancer. Surgical endoscopy. 2021.03; 35 (3): 1317-1323. ( PubMed, DOI )

Isumi A, Doi S, Yamaoka Y, Takahashi K, Fujiwara T. Do suicide rates in children and adolescents change during school closure in Japan? The acute effect of the first wave of COVID-19 pandemic on child and adolescent mental health. Child abuse & neglect. 2020.12; 110 (Pt 2): 104680. ( PubMed, DOI )

Yamaoka Y, Imai K, Shiomi A, Kagawa H, Hino H, Yamakawa Y, Yamaguchi T, Kinugasa Y, Kishida Y, Ito S, Hotta K, Imai T. Endoscopic resection of T1 colorectal cancer prior to surgery does not affect surgical adverse events and recurrence. Surgical endoscopy. 2020.11; 34 (11): 5006-5016. ( PubMed, DOI )

Baba S, Eshak ES, Shirai K, Fujiwara T, Yamaoka Y, Iso H. Factors Associated With Family Member's Spanking of 3.5-year-old Children in Japan. Journal of epidemiology. 2020.10; 30 (10): 464-473. ( PubMed, DOI )

Baba Sachiko, Eshak Ehab S., Shirai Kokoro, Fujiwara Takeo, Yamaoka Yui, Iso Hiroyasu. 日本における3.5歳児に対する家族による折檻に関連する因子(Factors Associated With Family Member's Spanking of 3.5-year-old Children in Japan) Journal of Epidemiology. 2020.10; 30 (9-10): 464-473. ( ichushi )

Yamaoka Y, Fujiwara T, Fujino Y, Matsuda S, Fushimi K. Response to the Letter to Editor: "Do Inter-Country Differences in the Frequency of Abusive Head Trauma Reflect Different Proportions of Overdiagnosis of Abuse or True Differences in Abuse?". Journal of epidemiology. 2020.06; 30 (6): 278-279. ( PubMed, DOI )

Nakai N, Yamaguchi T, Kinugasa Y, Shiomi A, Kagawa H, Yamakawa Y, Numata M, Furutani A, Yamaoka Y, Manabe S, Sawada A. Diagnostic value of computed tomography (CT) and positron emission tomography (PET) for paraaortic lymph node metastasis from left-sided colon and rectal cancer. Asian journal of surgery. 2020.06; 43 (6): 676-682. ( PubMed, DOI )

Yamaoka Y, Fujiwara T, Fujino Y, Matsuda S, Fushimi K. Incidence and age distribution of hospitalized presumptive and possible abusive head trauma of children under 12 months old in Japan. JOURNAL OF EPIDEMIOLOGY. 2020.02; 30 (2): 91-97. ( PubMed, DOI )

Yamaoka Yui, Fujiwara Takeo, Fujino Yoshihisa, Matsuda Shinya, Fushimi Kiyohide. 日本における虐待による乳幼児頭部外傷と疑われたもしくは可能性のある生後12ヵ月未満乳幼児の入院率と月齢分布について(Incidence and Age Distribution of Hospitalized Presumptive and Possible Abusive Head Trauma of Children Under 12 Months Old in Japan) Journal of Epidemiology. 2020.02; 30 (1-2): 91-97. ( ichushi )

Yamaoka Y, Yamaguchi T, Kinugasa Y, Shiomi A, Kagawa H, Yamakawa Y, Furutani A, Manabe S, Torii K, Koido K, Mori K. Mesorectal fat area as a useful predictor of the difficulty of robotic-assisted laparoscopic total mesorectal excision for rectal cancer. Surgical endoscopy. 2019.02; 33 (2): 557-566. ( PubMed, DOI )

Yamaguchi T, Kinugasa Y, Shiomi A, Kagawa H, Yamakawa Y, Furuatni A, Manabe S, Yamaoka Y, Hino H. Short- and long-term outcomes of robotic-assisted laparoscopic surgery for rectal cancer: results of a single high-volume center in Japan. International journal of colorectal disease. 2018.12; 33 (12): 1755-1762. ( PubMed, DOI )

Yamaguchi T, Kinugasa Y, Shiomi A, Kagawa H, Yamakawa Y, Furutani A, Manabe S, Yamaoka Y, Hino H. Oncological outcomes of robotic-assisted laparoscopic versus open lateral lymph node dissection for locally advanced low rectal cancer. Surgical endoscopy. 2018.11; 32 (11): 4498-4505. ( PubMed, DOI )

Yamaoka Yui, Tamiya Nanako, Watanabe Akimitsu, Miyazono Yayoi, Tanaka Ryuta, Matsuzawa Akemi, Sumazaki Ryo. 日本における重症心身障害児の病院での医療的ケアの利用(Hospital-based care utilization of children with medical complexity in Japan) Pediatrics International. 2018.07; 60 (7): 626-633. ( ichushi )

Yamaoka Yui, Morisaki Naho, Noguchi Haruko, Takahashi Hideto, Tamiya Nanako. 日本における死因別乳児死亡の危険因子に関する総合評価(Comprehensive Assessment of Risk Factors of Cause-Specific Infant Deaths in Japan) Journal of Epidemiology. 2018.06; 28 (5-6): 307-314. ( ichushi )

Ohashi Hirotsuna, Wada Ichiro, Yamaoka Yui, Nakajima-Yamaguchi Ryoko, Ogai Yasukazu, Morita Nobuaki. 日本での児童保護システムによる集中介入後に発生した児童虐待に対する家庭機能不全の累積リスクが及ぼす影響　縦断分析(Cumulative risk effect of household dysfunction for child maltreatment after intensive intervention of the child protection system in Japan: a longitudinal analysis) Environmental Health and Preventive Medicine. 2018.04; 23 (April): 1-11. ( ichushi )

Sugiyama Takehiro, Tamiya Nanako, Watanabe Taeko, Wakui Tomoko, Shibayama Taiga, Moriyama Yoko, Yamaoka Yui, Noguchi Haruko. 日本人の介護保険受給者の要介護度と介護家族の健診受診との関連(Association of care recipients' care-need level with family caregiver participation in health check-ups in Japan) Geriatrics & Gerontology International. 2018.01; 18 (1): 26-32. ( ichushi )

Kachi Y, Fujiwara T, Yamaoka Y, Kato T. Parental Socioeconomic Status and Weight Faltering in Infants in Japan. Frontiers in pediatrics. 2018; 6 127. ( PubMed, DOI )