Updated on 2026/05/22

写真a

 
NARITA Kenji
 
Organization
School of Medicine Department of Psychiatry Assistant Professor
Title
Assistant Professor
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Papers

  • 病院内の入院患者の自殺事故予防の取り組み 入院患者の自殺事故予防の取り組みと研修事業の背景と経緯

    河西 千秋, 小山 達也, 成田 賢治, 津山 雄亮, 大塚 耕太郎

    精神神経学雑誌   ( 2025特別号 )   S588 - S588   2025.6

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    Language:Japanese   Publisher:(公社)日本精神神経学会  

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  • Effectiveness of the 10 Essentials Workshop Program in Changing Attitudes Toward Suicide Among Mental Health Professionals. International journal

    Kenji Narita, Chiaki Kawanishi, Yusuke Tsuyama, Shizuka Kawamoto, Tomonori Kashiwagi, Ryutaro Ishibashi, Yoshinori Cho, Kotaro Otsuka

    Cureus   17 ( 1 )   e77830   2025.1

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    INTRODUCTION: Mental health professionals play an important role in helping patients at risk of suicide. Therefore, mental health professionals must acquire basic knowledge and skills in suicide prevention to support patients with suicidal behavior. However, not all mental health professionals have sufficient knowledge and skills, and educational programs for mental health professionals are rare. We previously developed a workshop covering 10 steps healthcare professionals must take to care for mentally ill patients (the 10 Essentials program), and we adapted it for suicide prevention. This study aimed to evaluate the 10 Essentials program's effectiveness in educating mental health professionals. METHODS: This was an intervention study (pre-post comparison test). The participants of the present study were the mental health professionals (psychiatrists, psychiatric nurses, mental health social workers, clinical psychologists, and occupational therapists) who took part in the 10 Essentials workshops we delivered to several communities in Japan. The Attitudes Toward Suicide Scale (ATTS) was administered to the participants pre- and post-training to assess changes in their attitudes toward suicide after participating in the program. RESULTS: We analyzed data from 264 participants who completed the questionnaires. Their ATTS scores at post-training were significantly higher (and therefore more favorable) in the following dimensions: "common occurrence" (p = 0.012), "unjustified behavior" (p < 0.0001), and "preventability/readiness to help" (p < 0.0001), compared with those at pretraining. The ATTS scores at post-training were significantly lower (and therefore more favorable) in "right to suicide" (p < 0.0001), "suicidal expression as a mere threat" (p < 0.0001), and "impulsiveness" (p < 0.0001) compared with pretraining scores. Attitudes toward suicide among the participants shifted in a favorable direction after the program. CONCLUSION:  In this study, the 10 Essentials program was effective in improving attitudes toward suicide among mental health professionals. Their attitudes became more favorable for helping patients with suicidal behavior. Further study will be needed to examine participants with different backgrounds and the long-term effects of the training.

    DOI: 10.7759/cureus.77830

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  • Attitudes of medical professionals towards high-risk suicidal patients. International journal

    Tomonori Kashiwagi, Kenji Narita, Yusuke Tsuyama, Naohiro Yonemoto, Ryutaro Ishibashi, Chiaki Kawanishi

    Frontiers in psychiatry   16   1654240 - 1654240   2025

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    AIM: Suicide is a serious global public health challenge recognised as a high priority by the World Health Organization. Knowledge and attitudes of healthcare professionals and first responders play a critical role in suicide prevention. This study aimed to clarify attitudes and influencing factors among paramedics, nurses, and social workers in Japan. METHODS: We conducted a cross-sectional survey between 2015 and 2022 using a self-administered paper questionnaire. The Japanese version of the Attitudes Toward Suicide scale assessed six factors using a five-point Likert scale. A linear regression model was used to analyse variations associated with age, gender, profession, and experience. RESULTS: Among 685 respondents, 443 provided valid responses (paramedics: 34.8%, nurses: 38.8%, social workers: 26.4%). Paramedics were more likely than social workers to regard suicide as an unjustified act (β = 0.474, 95% CI: 0.167-0.780, P = 0.003) and as a threat (β = 0.450, 95% CI: 0.142-0.757, P = 0.004), and less likely to think suicide can happen to anyone (β = -0.640, 95% CI: -0.855--0.425, P < 0.001). Nurses regarded suicide as a threat (β = 0.394, 95% CI: 0.134-0.653, P = 0.003) and as an impulsive act (β = 0.220, 95% CI: 0.024-0.416, P = 0.028). CONCLUSION: Although we found differences in attitudes towards suicide between health professionals, there were also many commonalities. By holding workshops with a wide range of professionals, and deepening mutual understanding, it may be possible to implement seamless suicide prevention measures.

    DOI: 10.3389/fpsyt.2025.1654240

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  • The effect of lemborexant on insomnia in patients with psychiatric disorders: Detailed evaluation using the Athens Insomnia Scale. International journal

    Tomonori Murayama, Yuji Ito, Kenji Narita, Tetsuro Ishida, Shiro Hinotsu, Masahiko Fujita

    PCN reports : psychiatry and clinical neurosciences   3 ( 1 )   e165   2024.3

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    AIM: Chronic insomnia disorder is common and associated with reduced quality of life. Benzodiazepine hypnotics are commonly prescribed for insomnia, but have potential side effects such as concentration impairment, somnolence, and dependence. Lemborexant (LEM) is an orexin receptor antagonist considered to have fewer side effects than benzodiazepine hypnotics. This study evaluated the effect of LEM on sleep in detail and examined whether benzodiazepine hypnotics can be gradually tapered by adding LEM. METHODS: We retrospectively examined the effectiveness of LEM in 28 outpatients with insomnia. Insomnia symptoms were assessed using the Athens Insomnia Scale (AIS) before and after LEM administration. We also attempted to taper benzodiazepine hypnotics and assessed benzodiazepine dose using diazepam equivalents for some patients taking benzodiazepine hypnotics. Wilcoxon's signed-rank test was used for statistical analysis. RESULTS: The mean AIS score was significantly improved after LEM treatment (8.7 ± 5.2 vs. 3.8 ± 3.3; P < 0.01). Among the AIS subitems, significant improvement was observed for six items: sleep induction, awakenings during the night, sleep quality, well-being, functioning capacity, and sleepiness during the day. The mean benzodiazepine dose was significantly lower after LEM treatment (4.6 ± 5.0 mg vs. 2.1 ± 3.3 mg; P < 0.01). CONCLUSIONS: This study indicated the potential of LEM for improving insomnia and reducing benzodiazepine dose.

    DOI: 10.1002/pcn5.165

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  • Changes in health-related quality of life in patients admitted to emergency departments for attempted suicide: Findings from a large longitudinal study. International journal

    Kenji Narita, Naohiro Yonemoto, Yoshitaka Kawashima, Michiko Takai, Mayuko Matsuo, Yoshio Hirayasu, Chiaki Kawanishi

    Journal of affective disorders   347   262 - 268   2024.2

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    BACKGROUND: Studies of quality of life among suicide attempters are limited while it is considered important for preventing reattempt of suicide. We investigated health related quality of life (HRQoL) in suicide attempters immediately after the suicide attempt and in the long term. METHODS: This was longitudinal data from a randomized controlled multicenter trial. The Japanese version of the Short Form Health Survey-36 as HRQOL measured at 0, 6, and 12 months after randomization. RESULTS: 799 patients (356 men and 443 women) were analyzed. At baseline, the mean physical component summary (PCS) and the mental component summary (MCS) scores were 34.56 and 35.15, respectively, and they were significantly low compared with those of the general population. PCS scores significantly improved from baseline to 6 months (p = 0.003), from baseline to 12 months (p < 0.0001), and from baseline to 12 months (p = 0.002). MCS scores significantly improved from baseline to 6 months (p < 0.0001) and from baseline to 12 months (p < 0.0001). However, neither PCS nor MCS scores reached those of the general population norm at 12 months post-suicide attempt. LIMITATIONS: Patients younger than 20 years and patients who self-harmed but were not admitted to an emergency department were excluded. CONCLUSION: This study presents a trajectory of HRQoL scores in suicide attempters from immediately after the suicide attempt to 1 year later. Further studies on HRQoL in suicide attempters are needed to elucidate the effective care for the attempters.

    DOI: 10.1016/j.jad.2023.11.036

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  • Suicide prevention and postvention in hospitals in Japan: Current status and perspectives. International journal

    Keisuke Inoue, Chiaki Kawanishi, Kenji Narita, Yoshinori Cho, Kotaro Otsuka

    Psychiatry and clinical neurosciences   74 ( 7 )   414 - 415   2020.7

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    DOI: 10.1111/pcn.13015

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  • Multi-institutional survey of suicide death among inpatients with schizophrenia in comparison with depression. International journal

    Keisuke Inoue, Kotaro Otsuka, Hideki Onishi, Yoshinori Cho, Masaki Shiraishi, Kenji Narita, Chiaki Kawanishi

    Asian journal of psychiatry   48   101908 - 101908   2020.2

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    Suicide is a major cause of death among inpatients with schizophrenia. However, there are only a limited number of surveys of suicide among such patients, especially in Asia. Therefore, we conducted a multi-institutional survey on suicide death among inpatients with schizophrenia in Japan. We investigated the characteristics of patients with schizophrenia who died by suicide during hospitalization in psychiatric wards, and simultaneously, those of patients with depression. Forty-five suicides of patients with schizophrenia occurred in 27 hospitals, and 46 suicides of patients with depression occurred in 33 hospitals. Hanging was the most common suicide method in both diagnostic groups. More than half of the patients with schizophrenia had histories of suicide attempts, although there was no significant difference in previous suicide attempts or self-harm between both diagnostic groups. Medical staff should confirm whether inpatients with schizophrenia have such histories. In this study, there was no significant difference in characteristics between inpatients with schizophrenia or depression. In order to prevent suicides of patients with schizophrenia during hospitalization, nonspecific suicide attempt prevention needs to be undertaken, such as ensuring comprehension of the general risk factors of suicide among medical staff.

    DOI: 10.1016/j.ajp.2019.101908

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  • Psychiatric Consultations at an Emergency Department in a Metropolitan University Hospital in Northern Japan. International journal

    Masaki Shiraishi, Takao Ishii, Yoshiyasu Kigawa, Masaya Tayama, Keisuke Inoue, Kenji Narita, Masaru Tateno, Chiaki Kawanishi

    Psychiatry investigation   15 ( 7 )   739 - 742   2018.7

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    Many patients with mental disorders visit emergency departments (EDs). However, the majority of these patients do not receive psychiatric assessment. In the present study, we investigated the detailed proportion of patients with mental disorders visiting an urban ED in the largest northern city in Japan. A retrospective chart review study was performed at a University Hospital from January 2012 to December 2015. The reasons for psychiatric consultations made by ED staff, and the primary psychiatric diagnoses were investigated. Among all living patients, 20% of them received consultations. The most common reason for consultation was suicide attempt followed by agitation or insomnia. Of all diagnoses, organic mental disorder was the most frequent and the mean age was significantly higher than the other diagnostic groups. Our study indicated that the frequency of psychiatric consultation was high. This indicates the high demand for mental health services at the ED. A thorough psychiatric assessment can provide adequate psychiatric services to acute patients; thereby possibly preventing suicide attempters from later actually dying by suicide.

    DOI: 10.30773/pi.2018.04.04

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MISC

  • 自殺未遂者の社会機能と作業療法介入の効果に関する予備的研究

    阿部雅, 石橋竜太朗, 柏木智則, 成田賢治, 島田清貴, 島田清貴, 森元隆文, 横山和樹, 池田望, 河西千秋

    精神神経学雑誌   127 ( 3 )   2025

  • 総合病院における精神科救急~病院内連携,地域連携からみえた課題と展望~札幌医科大学附属病院神経精神科における重症自殺未遂者への介入と病棟管理における諸課題

    石橋竜太朗, 阿部雅, 柏木智則, 成田賢治, 河西千秋

    精神科救急   27   2024

  • 精神保健福祉士による自殺未遂者支援:救急患者精神科継続支援におけるソーシャルワーク支援

    松村里歩, 昌川安希子, 石橋竜太朗, 津山雄亮, 成田賢治, 佐野智章, 河西千秋

    日本自殺予防学会総会プログラム・抄録集   48th   2024

  • 外傷性自殺企図患者の精神・身体機能の障害とその推移に関する予備研究

    阿部雅, 石橋竜太朗, 柏木智則, 成田賢治, 池田望, 森元隆文, 横山和樹, 河西千秋

    精神神経学雑誌   126 ( 9 )   2024

  • がん患者に対するメンタル・ヘルス支援と自殺予防のための複合的ケース・マネジメント介入:予備的研究

    成田賢治, 野呂孝徳, 川村舞, 菅原夏海, 昌川安希子, 石田真弓, 大西秀樹, 河西千秋

    日本精神神経学会総会プログラム・抄録集   120th   2024

  • 総合病院有床精神科における外傷性自殺企図患者の治療に関する実態調査

    阿部雅, 石橋竜太朗, 柏木智則, 成田賢治, 池田望, 森元隆文, 横山和樹, 河西千秋

    総合病院精神医学   35 ( Supplement (Nov) )   2023

  • 病院内の自殺予防対策の課題と実践 病院内における2次予防対策

    河西千秋, 成田賢治, 大西秀樹, 大塚耕太郎, 小田原俊成, 吉内一浩, 稗田里香

    患者安全推進ジャーナル   2023

  • 自殺企図行動に関する基礎知識 精神疾患と自殺

    成田賢治

    患者安全推進ジャーナル   2023

  • 自殺企図行動に関する基礎知識 自殺と自殺関連行動

    河西千秋, 成田賢治

    患者安全推進ジャーナル   2023

  • 自殺ハイリスク者に対する第1介入者のAttitude

    柏木智則, 津山雄亮, 津山雄亮, 菅原夏海, 橋本恵理, 成田賢治, 河西千秋, 河西千秋

    日本精神神経学会総会プログラム・抄録集   119th   2023

  • 診断後1年以内のがん患者に対するメンタル・ヘルス支援と自殺予防のための予備的研究-複合的ケースマネジメント介入のフィージビリティ-

    成田賢治, 野呂孝徳, 川村舞, 菅原夏海, 大江開, 佐野智章, 昌川安希子, 河西千秋

    精神神経学雑誌   125 ( 12 )   2023

  • Status after the large scale clinical trial, ACTION-J study: Social implementation of the intervention programmes and findings from secondary analyses

    河西千秋, 成田賢治, 米本直裕

    救急医学   47 ( 8 )   2023

  • 診断後一年以内のがん患者に対する心理的危機介入のための複合的ケース・マネジメント介入:フィージビリティ研究

    成田賢治, 野呂孝徳, 川村舞, 菅原夏海, 大江開, 佐野智章, 昌川安希子, 石井貴男, 大西秀樹, 河西千秋

    日本うつ病学会総会プログラム・抄録集   20th   2023

  • Postvention for Medical Staff after Inpatient Suicide

    河西千秋, 津山雄亮, 成田賢治

    グリーフ&ビリーブメント研究   ( 4 )   2023

  • 精神科病棟の消灯時間変更に伴う不眠時頓服薬使用状況の変化

    工藤祥太, 村山友規, 佐藤真弓, 伊藤友二, 成田賢治, 畠山茂樹

    日本睡眠学会定期学術集会プログラム・抄録集   47th   2022

  • 病院内の自殺事故予防と事後対応-教育プログラムの効果-

    菅原夏海, 津山雄亮, 成田賢治, 河西千秋

    精神神経学雑誌   124 ( 12 )   2022

  • 病院内の自殺対策と医療スタッフのメンタルヘルス・ケアの実態:一般病院と精神科病院の比較

    菅原夏海, 津山雄亮, 成田賢治, 大塚耕太郎, 大西秀樹, 張賢徳, 河西千秋

    日本うつ病学会総会プログラム・抄録集   19th   2022

  • W1-7 認知症ケアチーム活動開始による精神科リエゾンチームへの影響に関する検討

    工藤祥太, 佐藤真弓, 道見朋香, 伊藤友二, 村山友規, 成田賢治, 畠山茂樹

    日本CNS看護学会誌(Web)   9 ( supplement )   2022

  • がん患者の入院中の自殺関連事故-認定病院患者安全推進協議会会員病院「がん患者の自殺関連事故アンケート調査」より

    成田賢治, 河西千秋

    患者安全推進ジャーナル   ( 69 )   2022

  • メンタルヘルス支援と自殺予防のためのケース・マネジメント介入を実施した乳がん患者の1例

    岩木敦子, 佐藤明美, 石井貴男, 出利葉健太, 成田賢治, 大江開, 佐野智章, 河西千秋

    精神神経学雑誌   124 ( 7 )   2022

  • 消防・救急隊員と医師・看護師における自殺企図行動に対するAttitudeの比較・検討

    柏木智則, 津山雄亮, 菅原夏海, 成田賢治, 河西千秋

    総合病院精神医学   34 ( Supplement )   2022

  • 自殺ハイリスク者に対応する第1介入者のattitude

    柏木智則, 津山雄亮, 津山雄亮, 菅原夏海, 橋本恵理, 成田賢治, 河西千秋, 河西千秋

    精神神経学雑誌   124 ( 12 )   2022

  • がん患者の自殺予防を目的としたケース・マネジメント介入:フィジビリティ研究

    石井貴男, 岩木敦子, 津山雄亮, 菅原夏海, 成田賢治, 大江開, 佐野智章, 河西千秋

    総合病院精神医学   34 ( Supplement )   2022

  • 自殺念慮の確認と自殺リスク評価

    成田賢治, 河西千秋

    Depression Strategy   11 ( 1 )   2021

  • 病棟デイケアによって衝動性が改善した特発性基底核石灰化症の一例

    工藤祥太, 村山友規, 成田賢治, 伊藤友二, 畠山茂樹

    総合病院精神医学   33 ( Supplement )   2021

  • Suicide prevention under COVID- 19 pandemic

    河西千秋, 成田賢治, 津山雄亮

    医学のあゆみ   277 ( 7 )   2021

  • Suicide Risk Factors and Mental Health: Recent themes and suicide prevention in medicine

    河西千秋, 成田賢治

    精神医学   63 ( 7 )   2021

  • Contribution of psychiatrists to community suicide prevention.

    河西千秋, 成田賢治

    精神科治療学   35 ( 8 )   2020

  • Integration of assessment and intervention for suicide prevention

    河西千秋, 成田賢治, 川島義高

    臨床精神医学   49 ( 8 )   2020

  • 精神症状に注目し迅速な診断と治療が可能であった抗NMDA受容体脳炎の1例

    村山友規, 成田賢治, 齋藤京史郎, 白石将毅, 鈴木秀一郎, 河西千秋

    精神神経学雑誌   122 ( 2 )   2020

  • 精神科領域における情報通信技術(ICT:Information and Communication Technology)とAIの活用 スマートフォンのアプリケーションを用いた自殺予防

    白石将毅, 成田賢治, 河西千秋

    臨床精神医学   48 ( 9 )   2019

  • 厚生労働省自殺未遂者再企図防止事業:臨床現場におけるケース・マネージメント介入の実態

    白石将毅, 石井貴男, 津山雄亮, 岩木敦子, 野呂孝徳, 成田賢治, 煤賀隆宏, 田山真矢, 木川昌康, 河西千秋

    日本精神神経学会総会プログラム・抄録集   115th   2019

  • 時間感覚の変容に注目し迅速な診断と治療が可能であった抗NMDA受容体脳炎の一例

    村山友規, 成田賢治, 齋藤京史郎, 白石将毅, 蛭子育美, 鈴木秀一郎, 河西千秋

    総合病院精神医学   31 ( Supplement )   2019

  • 自殺未遂者に対するケース・マネージメント介入と救急患者精神科継続支援 2:心理社会的評価と介入

    岩木敦子, 昌川安希子, 石井貴男, 木川昌康, 白石将毅, 津山雄亮, 煤賀隆宏, 成田賢治, 河西千秋

    日本自殺予防学会総会プログラム・抄録集   43rd   2019

  • 自殺未遂者に対するケース・マネージメント介入と救急患者精神科継続支援 1:精神医学的評価と介入

    津山雄亮, 白石将毅, 石井貴男, 岩木敦子, 昌川安希子, 煤賀隆宏, 木川昌康, 成田賢治, 河西千秋

    日本自殺予防学会総会プログラム・抄録集   43rd   2019

  • 過量服薬A to Z 過量服薬と自殺

    成田賢治, 乾真美, 白石将毅, 河西千秋

    臨床精神薬理   22 ( 3 )   2019

  • 希死念慮を有する筋萎縮性側索硬化症(ALS)患者の延命治療の意思決定に際して精神科リエゾンチームが介入した1例

    成田賢治, 石井貴男, 河西千秋

    精神神経学雑誌   120 ( 8 )   2018

  • 厚生労働省自殺未遂者再企図防止事業3ヵ年間における自殺企図者の実態 1:精神医学的評価を中心に

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