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Research Achievements

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1) Malaria prevalence, knowledge, perception, preventive and treatment behavior among military in Champasak and Attapeu provinces, Lao PDR: a mixed methods study. Vilay PNonaka D, Senamonty P, Lao M, Iwagami M, Kobayashi JHernandez PM, Phrasisombath K, Kounnavong S, Hongvanthong B, Brey PT, Kano S. Trop Med Health. 2019;47:11.

2) Malaria among foreign migrant workers in Savannakhet Province, Lao People's Democratic Republic. Pongvongsa T, Nonaka D, Iwagami M, Soundala P, Khattignavong P, Xangsayarath P, Nishimoto F, Kobayashi J, Hongvanthon B, Brey PT, Kano S.Trop Med Health. 2019;47:10.

3) Oral health behavior of children and guardians' beliefs about children's dental caries in Vientiane, Lao People's Democratic Republic (Lao PDR). Phanthavong S, Nonaka D, Phonaphone T, Kanda K, Sombouaphan P, Wake N, Sayavong S, Nakasone T, Phongsavath K, Arasaki A. PLoS One. 2019;14:e0211257.

4) Intestinal helminth infections in HIV-infected patients in Savannakhet after establishment of an HIV registration network in Lao People's Democratic Republic. Kaneshiro Y, Sourinphoumy K, Imaizumi N, Rasaphon M, Kuba-Miyara M, Sakihama S, Guerrero CLH, Nhativong K, Nonaka D, Pongvongsa T, Kobayashi J, Kounnavong S, Fukushima T. Trop Med Health. 2019;47:14.

5) Quality of public school toilets and the frequency of changing sanitary napkins among students in public secondary schools in the City of Manila, Philippines. Katsuno CGregorio ER JrLomboy MFTCNonaka DHernandez PMREstrada CAM, Pimentel JMT, Bernadas RMGC, Kobayashi J. Trop Med Health. 2019;47:5.

6)Knowledge, attitudes, and practices of public secondary school teachers on Zika Virus Disease: A basis for the development of evidence-based Zika educational materials for schools in the Philippines.
Gregorio ER Jr, Medina JRC, Lomboy MFTC, Talaga ADP, Hernandez PMRKodama M, Kobayashi J.
PLoS One. 2019 28;14(3)

7)Suicidal ideation, suicidal behaviors, and attitudes towards suicide of adolescents enrolled in the Alternative Learning System in Manila, Philippines-a mixed methods study.
Estrada CAM, Nonaka DGregorio ER Jr, Leynes CR, Del Castillo RT, Hernandez PMR, Hayakawa T, Kobayashi J.
Trop Med Health. 2019 29;47:22.

8)Religious education can contribute to adolescent mental health in school settings
Crystal Amiel M. EstradaEmail author, Marian Fe Theresa C. LomboyErnesto R. GregorioJr., Emmy Amalia, Cynthia R. Leynes, Romeo R. Quizon and Jun Kobayashi
International Journal of Mental Health Systems 2019 13:28

9)Is there a gap between health education content and practice toward schistosomiasis prevention among schoolchildren along the shores of Lake Victoria in Kenya?
Takeuchi R, Njenga SM, Ichinose Y, Kaneko S, Estrada CAKobayashi J. 
PLoS Negl Trop Dis. 2019, 19;13(8):e0007572. 

10) Is the place of birth related to the mother's satisfaction with childbirth? A cross-sectional study in a rural district of the Lao People's Democratic Republic (Lao PDR).
Takayama T, Phongluxa K, Nonaka DSato C, Gregorio ER JrInthavong N, Pongvongsa T, Kounnavong S, Kobayashi J.
BMC Pregnancy Childbirth. 2019 Sep 11;19(1):333.

11) Factors influencing the choice of facility-based delivery in the ethnic minority villages of Lao PDR: a qualitative case study.
Sato C, Phongluxa K, Toyama NGregorio ER Jr, Miyoshi C, Nishimoto F, Takayama T, Pongvongsa T, Takahashi K, Kounnavong S, Kobayashi J.
Trop Med Health. 2019 Sep 5;47:50

Strengthening self-help and mutual aid in Japan’s community-based integrated care system based on the Thai health policy for the elderly. Sudo K, Kobayashi J, Noda S, Chompikul J, Fukuda Y, Takahashi K  
J Public Health Development 2019 17 (2) 115-129

13) The Determinants of skilled birth attendance at childbirth in Attapeu province, Lao People’s Democratic Republic. Ibi T, Takahashi K, Kounnavong S, Kobayashi J, Noda S, Horiuchi S, Makimoto S, Phrommala S, Yamaoka K
J Public Health Development 2019 17 (2) 93-113



1)Key factors for school health policy implementation in Thailand.
Tomokawa S, Kaewviset S, Saito J, Akiyama T, Waikugul J, Okada K, Kobayashi J, Jimba M.
Health Educ Res. 2018 1;33(2):186-195
2)Japan's healthcare policy for the elderly through the concepts of self-help (Ji-jo), mutual aid (Go-jo), social solidarity care (Kyo-jo), and governmental care (Ko-jo).
Sudo K, Kobayashi J, Noda S, Fukuda Y, Takahashi K.
Biosci Trends. 2018 18;12(1):7-11
3)Systematic review of school tobacco prevention programs in African countries from 2000 to 2016.
Nishio A, Saito J, Tomokawa S, Kobayashi J, Makino Y, Akiyama T, Miyake K, Yamamoto M.
PLoS One. 2018 6;13(2)
4)Socioeconomic determinants of accessibility to birth registration in Lao PDR.
Nomura M, Xangsayarath P, Takahashi K, Kamiya Y, Siengsounthone L, Ogino H, Kobayashi J.
BMC Public Health. 2018 8;18(1):116
5)Youth sports activity and young people's well-being after a disaster: a trial with the Mastery Approach to Coaching (MAC) in the Philippines.
Akiyama T, Gregorio ER Jr, Kobayashi J.
BMC Res Notes. 2018 22;11(1):747.

6)Pfcrt genotypes and related microsatellite DNA polymorphisms on Plasmodium falciparum differed among populations in the Greater Mekong Subregion.
Iwagami M, Tangpukdee N, Wilairatana P, Krudsood S, Dao LD, Nakazawa S, Sinuon M, Socheat D, Yasuoka J, Jimba M, Watanabe H, Kobayashi J, Toma H, Vanisaveth V, Hongvanthong B, Brey PT, Kano S.
 Parasitol Int. 2018 Dec;67(6):816-823.

7)Implementation of disaster risk reduction and management policies in a school setting in Lao PDR: a case study.
Kanyasan KNonaka D, Chatouphonexay A, Hernandez PM, Kounnavong S, Kobayashi J.
Trop Med Health. 2018,12;46:42.

8) Addressing challenges in children’s mental health in disaster-affected areas in Japan and the Philippines – highlights of the training program by the National Center for Global Health and Medicine
Usami M, Lomboy MRT, Satake N, Estrada CAMKodama M, Gregorio ERJ, Suzuki Y, Uytico RB, Molon MP, Harada I, Yamamoto K, Inazaki K, Ushijima H, Leynes C, Kobayashi J, Quizon RR, Hayakawa T
BMC Proceedings 2018 12 (Suppl 14) :65

9)Odds, challenges and new approaches in the control of helminthiasis, an Asian study
Sato MO, Adsakwattana P, Fontanill IKC, Kobayashi J, Sato M, Pongvongsa T Fornillos RJC, Waikagul J  
Parasite Epi Control 2018 4: e00083

10) Takahashi E, Nonaka D, Iwagami M, Phoutnalong V, Chanthakoumane K, Kobayashi J, Pongvongsa T, Kounnavong S, Hongvanthong B, Brey PT, Kano S. Patients' adherence to artemisinin-based combination therapy and healthcare workers' perception and practice in Savannakhet province, Lao PDR.Trop Med Health. 2018;46:44.

11) Kurotani K, Karunapema P, Jayaratne K, Sato M, Hayashi T, Kajio H, Fukuda S, Hara H, Okazaki O, Jayatilleke AU, Nonaka D, Noda M, Mizoue T. Circulating odd-chain saturated fatty acids were associated with arteriosclerosis among patients with diabetes, dyslipidemia, or hypertension in Sri Lanka but not Japan. Nutr Res. 2018;50:82-93. 


1)Individual and household factors associated with incidences of village malaria in Xepon district, Savannakhet province, Lao PDR.
Inthavong NNonaka D, Kounnavong S, Iwagami M, Phommala S, Kobayashi J, Hongvanthong B, Pongvongsa T, Brey PT, Kano S.
Trop Med Health. 2017 7;45:36.

2) Coinfection of Sexually Transmitted Infections among HIV-Positive Individuals: Cross-Sectional Results of a Community-Based Positive Living with HIV (POLH) Study in Nepal
Poudel KC, Poudel-Tandukar K, Palmer PH, Mizoue T, Jimba M, Kobayashi J, Acharya B, Pandey BD, Oka S.
J Int Assoc Provid AIDS Care. 2017

Inclusive Education in Association of Southeast Asian Nations (ASEAN): Literature Review from 1995–2015 Nishio A, Tomokawa S,Kobayashi J, Mizoue T, Horita T, Yamamoto M School Health. 2017, 13, 20-29


1. Akiyama T, Pongvongsa T, Phrommala S, Taniguch T, Inamine Y, Takeuchi R, Watanabe T, Nishimoto F, Moji K, Kano S, Watanabe H, Kobayashi J
Asymptomatic malaria, growth status, and anaemia among children in Lao People's Democratic Republic: a cross-sectional study
Malaria Journal 2016, 15:499

2. Pongvongsa T, Nonaka D, Iwagami M, Nakatsu M, Phongmany P, Nishimoto F, Kobayashi J, Hongvanthon B, Brey PT, Moji K, Mita T, Kano S
Household clustering of asymptomatic malaria infections in Xepon district, Savannakhet province, Lao PDR
Malaria Journal 2016, 15: 508

3. Gregorio, ER J., Kobayashi J, Medina JRC, Simbulan NP
Knowledge, attitudes, and related practices of Filipino seafarers regarding cardiovascular diseases
International Maritime Health 2016;67(4):214-222.

4. Nanri A, Nakamoto K, Sakamoto N, Imai T, Akter S, Nonaka D, Mizoue T.
Association of serum 25-hydroxyvitamin D with influenza in case-control study nested in a cohort of Japanese employees. Clin Nutr. 2016: pii: S0261-5614(16)30215-1.
5. Gunawardena N, Kurotani K, Indrawansa S, Nonaka D, Mizoue T, Samarasinghe D. School-based intervention to enable school children to act as change agents on weight, physical activity and diet of their mothers: a cluster randomized controlled trial. Int J Behav Nutr Phys Act. 2016;13:45



1. Asakura T, Mallee H, Tomokawa S, Moji K, Kobayashi J
The ecosystem approach to health is a promising strategy in international development: lessons from Japan and Laos

Globalization and Health 2015 11: 3

2. Sato M, Pongvongsa T, Sanguankiat S, Yoonuan T, Kobayashi J, Boupha B, Nishimoto F, Moji K, Sato MO, Waikagul J.

Patterns of trematode infections of Opisthorchis viverrini (Opisthorchiidae) and Haplorchis taichui (Heterophyidae) in human populations from two villages in Savannakhet Province, Lao PDR.

J Helminthol. 2015 Jul;89(4):439-45


3. Nonaka D, Pongvongsa T, Nishimoto F, Nansounthavong P, Sato Y, Jiang H, Takeuchi R, Moji K, Phongmany P, Kobayashi J

Households with insufficient bednets in a village with sufficient bednets: evaluation of household bednet coverage using bednet distribution index in Xepon district, Lao PDR

Trop Med Health 2015, 43 95-100


4. Myint K, Nonaka D, Jimba M, Nanishi K, Poudel K, Yasuoka J, Miyagi M, Shinjo M, Kobayashi J

Unnecessary Dieting Intention and Behavior among Female Students in Naha City, Japan

Trop Med Health 2015, 43 117-122

5.Saito J, Keosada N, Tomokawa S, Akiyama T, Kaewviset S, Nonaka D, Waikugul J, Kobayashi J, Souvanvixay M, Jimba M.

Factors influencing the National School Health Policy implementation in Lao PDR: a multi-level case study.

Health Promot Int. 2015 Dec;30(4):843-54

6. Takahashi K, Kobayashi J
Lessons from the Field Count more than Ever: The New Era of Global Health
Trop Med Health 2015,43(4) 243-245

7.Takahashi K, Kodama M, Ernesto R. Gregorio ERJ, Tomokawa S, Asakura T,  Waikagul J, Kobayashi J
School Health: an essential strategy in promoting community resilience and preparedness for natural disasters
Global Health Action 2015, 8: 29106