Kunihiko Nakai

3.8k citations

146 papers · 2.8k indexed · h-index 29

Health, Toxicology and Mutagenesis top 0.5%
- Mercury impact and mitigation studies 44
- Heavy Metal Exposure and Toxicity 40
- Toxic Organic Pollutants Impact 19
- Air Quality and Health Impacts 18
Obstetrics and Gynecology top 2%
- Pregnancy and preeclampsia studies 11
- Gestational Diabetes Research and Management 10
Pediatrics, Perinatology and Child Health top 2%
- Birth, Development, and Health 18
Nutrition and Dietetics top 2%
Pollution top 5%
Public Health, Environmental and Occupational Health
- Maternal Mental Health During Pregnancy and Postpartum 10

Co-authors: Hiroshi Satoh Katsuyuki Murata Mineshi Sakamoto Naoyuki Kurokawa Miyuki Iwai‐Shimada Satomi Kameo Nozomi Tatsuta Keita Suzuki
Cited by: Health, Toxicology and Mutagenesis Obstetrics and Gynecology Pediatrics, Perinatology and Child Health
Journals: SHILAP Revista de lepidopterología (1 paper)Environmental Science & Technology (1 paper)Gastroenterology (1 paper)
Partner nations: Japan United States Netherlands

In The Last Decade

Kunihiko Nakai

142 papers receiving 2.7k citations

Peers

Countries citing papers authored by Kunihiko Nakai

Since Specialization

Citations

This map shows the geographic impact of Kunihiko Nakai's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Kunihiko Nakai with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kunihiko Nakai more than expected).

Fields of papers citing papers by Kunihiko Nakai

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kunihiko Nakai. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Kunihiko Nakai. The network helps show where Kunihiko Nakai may publish in the future.

Co-authorship network

The 25 scholars most cited alongside Kunihiko Nakai, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Kunihiko Nakai Line = papers co-authored together Kunihiko Nakai links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	High-throughput mercury speciation analysis of breast milk using HPLC-ICP-MS Microchemical Journal ·Kenta Iwai,Miyuki Iwai‐Shimada,Tatsuta Nozomi,Yayoi Kobayashi,Kaname Asato,Motomi Nishimoto,Kunihiko Nakai,Shoji F. Nakayama	2025	2
2	Association Between Maternal Physical Activity From Pre-pregnancy to Child-rearing and Their Children’s Physical Activity in Early Childhood Among Japanese Journal of Epidemiology ·Aya Yamada,Haruki Momma,Nozomi Tatsuta,Kunihiko Nakai,Takahiro Arima,Chiharu Ota,Nobuo Yaegashi,Ryoichi Nagatomi	2024	2
3	Concentrations of neonicotinoid insecticides and their metabolites in multiple urine samples collected from pregnant women in Japan Environmental Research ·Neeranuch Suwannarin,Tomohiko Isobe,Yukiko Nishihama,Yuki Ito,Michihiro Kamijima,Takeshi Ebara,Mayumi Sugiura‐Ogasawara,Naomi Nishikawa,Kunihiko Nakai,Yumina Minamikawa,Shoji F. Nakayama	2023	10
4	Association between whole blood metallic elements concentrations and gestational diabetes mellitus in Japanese women: The Japan environment and Children's study Environmental Research ·Nozomi Tatsuta,Miyuki Iwai‐Shimada,Shoji F. Nakayama,Noriyuki Iwama,Hirohito Metoki,Takahiro Arima,Kasumi Sakurai,Akane Anai,Kaname Asato,Shinichi Kuriyama,Junichi Sugawara,Kichiya Suzuki,Nobuo Yaegashi,Michihiro Kamijima,Kunihiko Nakai	2022	17
5	Timing of Maternal Smoking Cessation and Newborn Weight, Height, and Head Circumference Obstetrics and Gynecology ·Nozomi Tatsuta,Kaname Asato,Akane Anai,Tomohisa Suzuki,Kasumi Sakurai,Chiharu Ota,Takahiro Arima,Junichi Sugawara,Nobuo Yaegashi,Kunihiko Nakai,(unknown)	2022	6
6	Intra- and Inter-Day Element Variability in Human Breast Milk: Pilot Study Toxics ·Kenta Iwai,Miyuki Iwai‐Shimada,Kaname Asato,Kunihiko Nakai,Yayoi Kobayashi,Shoji F. Nakayama,Nozomi Tatsuta	2022	2
7	Global DNA Methylation in Cord Blood as a Biomarker for Prenatal Lead and Antimony Exposures Toxics ·Yoshinori Okamoto,Miyuki Iwai‐Shimada,Kunihiko Nakai,Nozomi Tatsuta,Yoko Mori,Akira Aoki,Nakao Kojima,Tatsuyuki Takada,Hiroshi Satoh,Hideto Jinno	2022	5
8	A cross-sectional study of the association between effort-reward imbalance and psychologic distress among Japanese dietitians Journal of Occupational Health ·Kozue Yaginuma-Sakurai,Chotoku Saito,Yoshiko Kasahara,Kanami Tsuno,Kouichi Yoshimasu,Nozomi Tatsuta,Miki Goto,Kunihiko Nakai	2021	2
9	The delivery of a placenta/fetus with high gonadal steroid production contributes to postpartum depressive symptoms Depression and Anxiety ·Saya Kikuchi,Natsuko Kobayashi,Zen Watanabe,Chiaki Ono,Takashi Takeda,Hidekazu Nishigori,Nobuo Yaegashi,Takahiro Arima,Kunihiko Nakai,Hiroaki Tomita	2021	12
10	Health Risk Assessment and Source Apportionment of Mercury, Lead, Cadmium, Selenium, and Manganese in Japanese Women: An Adjunct Study to the Japan Environment and Children’s Study International Journal of Environmental Research and Public Health ·Chaochen Ma,Miyuki Iwai‐Shimada,Nozomi Tatsuta,Kunihiko Nakai,Tomohiko Isobe,M. Takagi,Yukiko Nishihama,Shoji F. Nakayama	2020	23
11	Exposure profile of mercury, lead, cadmium, arsenic, antimony, copper, selenium and zinc in maternal blood, cord blood and placenta: the Tohoku Study of Child Development in Japan Environmental Health and Preventive Medicine ·Miyuki Iwai‐Shimada,Satomi Kameo,Kunihiko Nakai,Kozue Yaginuma-Sakurai,Nozomi Tatsuta,Naoyuki Kurokawa,Shoji F. Nakayama,Hiroshi Satoh	2019	70
12	Update on the prevalence and determinants of folic acid use in Japan evaluated with 91,538 pregnant women: the Japan Environment and Children’s Study The Journal of Maternal-Fetal & Neonatal Medicine ·Tomofumi Ishikawa,Taku Obara,Hidekazu Nishigori,Toshie Nishigori,Hirohito Metoki,Mami Ishikuro,Nozomi Tatsuta,Satoshi Mizuno,Kasumi Sakurai,Ichiko Nishijima,Yuriko Murai,Ikuma Fujiwara,Takahiro Arima,Kunihiko Nakai,Nobuo Yaegashi,Shinichi Kuriyama,Nariyasu Mano	2018	14
13	Determinants of polyunsaturated fatty acid concentrations in erythrocytes of pregnant Japanese women from a birth cohort study: study protocol and baseline findings of an adjunct study of the Japan environment & Children’s study Environmental Health and Preventive Medicine ·(unknown),Shoji Saito,Terue Kawabata,Nozomi Tatsuta,Fumiko Kimura,Teruo Miyazawa,Satoshi Mizuno,Hidekazu Nishigori,Takahiro Arima,Yasuo Kagawa,Kouichi Yoshimasu,Kanami Tsuno,Yuki Ito,Michihiro Kamijima,Kunihiko Nakai,Nobuo Yaegashi	2017	14
14	Polyunsaturated Fatty Acid Levels in Maternal Erythrocytes of Japanese Women during Pregnancy and after Childbirth Nutrients ·Terue Kawabata,Yasuo Kagawa,Fumiko Kimura,Teruo Miyazawa,Shoji Saito,Takahiro Arima,Kunihiko Nakai,Nobuo Yaegashi	2017	23
15	Drug Use before and during Pregnancy in Japan: The Japan Environment and Children’s Study SHILAP Revista de lepidopterología ·Hidekazu Nishigori,Taku Obara,Toshie Nishigori,Hirohito Metoki,Mami Ishikuro,Satoshi Mizuno,Kasumi Sakurai,Nozomi Tatsuta,Ichiko Nishijima,Ikuma Fujiwara,Takahiro Arima,Kunihiko Nakai,Nariyasu Mano,Shinichi Kuriyama,Nobuo Yaegashi,(unknown)	2017	42
16	Pregnant Women’s Awareness of Social Capital in the Great East Japan Earthquake-Affected Areas of Miyagi Prefecture: The Japan Environment and Children’s Study Disaster Medicine and Public Health Preparedness ·Hidekazu Nishigori,Toshie Nishigori,Kasumi Sakurai,Satoshi Mizuno,Taku Obara,Hirohito Metoki,Zen Watanabe,Noriyuki Iwama,Mami Ishikuro,Nozomi Tatsuta,Ichiko Nishijima,Junichi Sugawara,Shinichi Kuriyama,Ikuma Fujiwara,Takahiro Arima,Kunihiko Nakai,Fumiaki Takahashi,Nobuo Yaegashi,(unknown)	2017	3
17	Chemical Pollution at the Sanriku Coastal Area after the Great East Japan Earthquake TRENDS IN THE SCIENCES ·Kunihiko Nakai,Daisuke Ueno,Haruhiko Nakata	2013	1
18	Effect of Zinc Deficiency on the Behavior of Metallothionein-I, II Knockout Mice Toshihiro Itoh,Kunihiko Nakai,Masahiko Satoh,Chieko Satoh,Satomi Kameo,Yoshihiko Nakagi,Yasuaki Saijo,Takahiko Yoshida,Akira Naganuma,Hirohisa Imai,Hiroshi Satoh	2010	2
19	Red Cell Apheresis as a New Means of Preparing Red Cell Concentrates(Symposium 5: Progress in Donor Apheresis) Sadamitsu Yamamoto,Kunihiko Nakai,Seiji Chiba,Toshie Nakase,Tsuneo Takahashi,Sadayoshi Sekiguchi	1996	0
20	A new donor plasmapheresis system with disk type membrane separator. Plasma separation using gravity without any electrical devices. Journal of the Japan Society of Blood Transfusion ·Tsuneo Takahashi,Mari Hosoda,Sadamitsu Yamamoto,Kunihiko Nakai,Sadayoshi Sekiguchi,Akira Yagishita,Tatsuya Fujii,Akira Takahashi	1990	1

About Kunihiko Nakai

Kunihiko Nakai is a scholar working on Health, Toxicology and Mutagenesis, Obstetrics and Gynecology and Pediatrics, Perinatology and Child Health, having authored 146 papers that have together received 2.8k indexed citations. Recurring topics across this work include Mercury impact and mitigation studies (44 papers), Heavy Metal Exposure and Toxicity (40 papers), Toxic Organic Pollutants Impact (19 papers), Birth, Development, and Health (18 papers), Air Quality and Health Impacts (18 papers), Pregnancy and preeclampsia studies (11 papers), Maternal Mental Health During Pregnancy and Postpartum (10 papers) and Gestational Diabetes Research and Management (10 papers). The work is most often cited by research in Health, Toxicology and Mutagenesis (1.4k citations), Obstetrics and Gynecology (234 citations) and Pediatrics, Perinatology and Child Health (539 citations). Kunihiko Nakai has collaborated with scholars based in Japan, United States and Netherlands. Frequent co-authors include Hiroshi Satoh, Katsuyuki Murata, Mineshi Sakamoto, Naoyuki Kurokawa, Miyuki Iwai‐Shimada, Satomi Kameo, Nozomi Tatsuta, Nozomi Tatsuta, Keita Suzuki and Takahiro Arima. Their work appears in journals such as SHILAP Revista de lepidopterología, Environmental Science & Technology and Gastroenterology.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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