Takuya Manaka

515 total citations
20 papers, 356 citations indexed

About

Takuya Manaka is a scholar working on Global and Planetary Change, Geochemistry and Petrology and Inorganic Chemistry. According to data from OpenAlex, Takuya Manaka has authored 20 papers receiving a total of 356 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Global and Planetary Change, 8 papers in Geochemistry and Petrology and 6 papers in Inorganic Chemistry. Recurrent topics in Takuya Manaka's work include Radioactive contamination and transfer (8 papers), Groundwater and Isotope Geochemistry (6 papers) and Radioactive element chemistry and processing (6 papers). Takuya Manaka is often cited by papers focused on Radioactive contamination and transfer (8 papers), Groundwater and Isotope Geochemistry (6 papers) and Radioactive element chemistry and processing (6 papers). Takuya Manaka collaborates with scholars based in Japan, Bangladesh and United States. Takuya Manaka's co-authors include Hodaka Kawahata, Atsushi Suzuki, H. M. Zakir Hossain, Toshihiro Yoshimura, Naohiro Imamura, Barry Roser, Yoshikazu Sampei, Daisuke Araoka, Satoru Miura and Shinya Iwasaki and has published in prestigious journals such as The Science of The Total Environment, Scientific Reports and Geochemistry Geophysics Geosystems.

In The Last Decade

Takuya Manaka

18 papers receiving 352 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Takuya Manaka Japan 10 119 105 87 83 77 20 356
R. M. Qureshi Pakistan 9 145 1.2× 85 0.8× 83 1.0× 38 0.5× 65 0.8× 21 442
V.D. Strakhovenko Russia 11 64 0.5× 58 0.6× 119 1.4× 59 0.7× 33 0.4× 55 323
Caroline Simonucci France 12 56 0.5× 197 1.9× 20 0.2× 74 0.9× 53 0.7× 19 396
Mattia Barsanti Italy 12 18 0.2× 107 1.0× 82 0.9× 70 0.8× 99 1.3× 22 344
M. Barrera Spain 11 30 0.3× 130 1.2× 59 0.7× 41 0.5× 39 0.5× 19 376
M.J. Stephenson Canada 13 44 0.4× 139 1.3× 110 1.3× 28 0.3× 98 1.3× 21 476
Ivana Delbono Italy 13 16 0.1× 131 1.2× 77 0.9× 85 1.0× 160 2.1× 22 390
Robert J. Elsinger United States 8 203 1.7× 105 1.0× 133 1.5× 76 0.9× 48 0.6× 9 403
Fumitaka Yanagisawa Japan 8 131 1.1× 92 0.9× 214 2.5× 66 0.8× 83 1.1× 31 409
Juan A. Alfonso Venezuela 12 58 0.5× 66 0.6× 74 0.9× 37 0.4× 52 0.7× 30 329

Countries citing papers authored by Takuya Manaka

Since Specialization
Citations

This map shows the geographic impact of Takuya Manaka'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 Takuya Manaka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Takuya Manaka more than expected).

Fields of papers citing papers by Takuya Manaka

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Takuya Manaka. 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 Takuya Manaka. The network helps show where Takuya Manaka may publish in the future.

Co-authorship network of co-authors of Takuya Manaka

This figure shows the co-authorship network connecting the top 25 collaborators of Takuya Manaka. A scholar is included among the top collaborators of Takuya Manaka based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Takuya Manaka. Takuya Manaka is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Imamura, Naohiro, Shinta Ohashi, Masatake G. Araki, et al.. (2026). Decadal stability of radiocesium inventories and soil to tree transfer in forests affected by the Fukushima nuclear accident. Scientific Reports. 16(1). 4653–4653.
2.
Manaka, Takuya, et al.. (2025). Assessment of radiocesium cycle equilibrium in a deciduous broad-leaved forest using stable cesium: A pilot study after the Fukushima accident. Journal of Environmental Radioactivity. 284. 107653–107653. 2 indexed citations
3.
Manaka, Takuya, Masatake G. Araki, Shinta Ohashi, et al.. (2023). Radiocesium mobility in different parts of the two major tree species in Fukushima. Scientific Reports. 13(1). 9144–9144. 2 indexed citations
4.
Manaka, Takuya, Masabumi Komatsu, Naohiro Imamura, et al.. (2022). Ten-year trends in vertical distribution of radiocesium in Fukushima forest soils, Japan. Journal of Environmental Radioactivity. 251-252. 106967–106967. 14 indexed citations
5.
Yamashita, Naoyuki, et al.. (2022). Slope-induced factors shape bacterial communities in surface soils in a forested headwater catchment. CATENA. 214. 106253–106253. 6 indexed citations
6.
Manaka, Takuya, et al.. (2021). Sorption and desorption experiments using stable cesium: considerations for radiocesium retention by fresh plant residues in Fukushima forest soils. Journal of Radioanalytical and Nuclear Chemistry. 329(1). 213–224. 9 indexed citations
7.
Yoshimura, Toshihiro, Shigeyuki Wakaki, Hodaka Kawahata, et al.. (2021). Stable Strontium Isotopic Compositions of River Water, Groundwater and Sediments From the Ganges–Brahmaputra–Meghna River System in Bangladesh. Frontiers in Earth Science. 9. 18 indexed citations
8.
Manaka, Takuya, et al.. (2020). Chemical sequential extraction of O horizon samples from Fukushima forests: Assessment for degradability and radiocesium retention capacity of organic matters. Journal of Environmental Radioactivity. 220-221. 106306–106306. 14 indexed citations
9.
Imamura, Naohiro, Mirai Watanabe, & Takuya Manaka. (2020). Estimation of the rate of 137Cs root uptake into stemwood of Japanese cedar using an isotopic approach. The Science of The Total Environment. 755(Pt 2). 142478–142478. 9 indexed citations
10.
Yoshimura, Toshihiro, Daisuke Araoka, Takuya Manaka, et al.. (2020). Seasonal and Spatial Variations of Chemical Weathering in the Mekong Basin: From the Headwaters to the Lower Reaches. Aquatic Geochemistry. 26(2). 137–159. 14 indexed citations
11.
Kawahata, Hodaka, Kazuhiko Fujita, Akira Iguchi, et al.. (2019). Perspective on the response of marine calcifiers to global warming and ocean acidification—Behavior of corals and foraminifera in a high CO2 world “hot house”. Progress in Earth and Planetary Science. 6(1). 88 indexed citations
12.
Manaka, Takuya, et al.. (2019). Six-year trends in exchangeable radiocesium in Fukushima forest soils. Journal of Environmental Radioactivity. 203. 84–92. 31 indexed citations
13.
Manaka, Takuya, H. M. Zakir Hossain, Toshihiro Yoshimura, Atsushi Suzuki, & Hodaka Kawahata. (2018). Monthly changes in <I>p</I>CO<sub>2</sub> in the Ganges River: implications for carbon release from soil to the atmosphere via inland waters. Journal of Agricultural Meteorology. 75(1). 47–55. 6 indexed citations
14.
Kawahata, Hodaka, et al.. (2017). Potential Influence of Ocean Acidification on Deep-Sea Fe–Mn Nodules: Results from Leaching Experiments. Aquatic Geochemistry. 23(4). 233–246.
15.
Manaka, Takuya, Daisuke Araoka, Toshihiro Yoshimura, et al.. (2017). Downstream and seasonal changes of lithium isotope ratios in the Ganges‐Brahmaputra river system. Geochemistry Geophysics Geosystems. 18(8). 3003–3015. 40 indexed citations
16.
Hossain, H. M. Zakir, et al.. (2017). Geochemical characteristics of modern river sediments in Myanmar and Thailand: Implications for provenance and weathering. Geochemistry. 77(3). 443–458. 59 indexed citations
17.
Okino, Kyoko, et al.. (2015). Preliminary report of AUV URASHIMA dives at Tarama and Irabu hydrothermal fields. Japan Geoscience Union. 1 indexed citations
18.
Manaka, Takuya, et al.. (2015). Chemical weathering and long‐term CO2 consumption in the Ayeyarwady and Mekong river basins in the Himalayas. Journal of Geophysical Research Biogeosciences. 120(6). 1165–1175. 15 indexed citations
19.
Manaka, Takuya, et al.. (2015). Spatial and Seasonal Variation in Surface Water pCO2 in the Ganges, Brahmaputra, and Meghna Rivers on the Indian Subcontinent. Aquatic Geochemistry. 21(5). 437–458. 20 indexed citations
20.
Manaka, Takuya, et al.. (2013). Rapid Alkalization in Lake Inawashiro, Fukushima, Japan: Implications for Future Changes in the Carbonate System of Terrestrial Waters. Aquatic Geochemistry. 19(4). 281–302. 8 indexed citations

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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2026