Akio Hirai

445 total citations
16 papers, 347 citations indexed

About

Akio Hirai is a scholar working on Mechanics of Materials, Global and Planetary Change and Aquatic Science. According to data from OpenAlex, Akio Hirai has authored 16 papers receiving a total of 347 indexed citations (citations by other indexed papers that have themselves been cited), including 5 papers in Mechanics of Materials, 5 papers in Global and Planetary Change and 4 papers in Aquatic Science. Recurrent topics in Akio Hirai's work include Hydrocarbon exploration and reservoir analysis (5 papers), Atmospheric and Environmental Gas Dynamics (3 papers) and Reproductive biology and impacts on aquatic species (3 papers). Akio Hirai is often cited by papers focused on Hydrocarbon exploration and reservoir analysis (5 papers), Atmospheric and Environmental Gas Dynamics (3 papers) and Reproductive biology and impacts on aquatic species (3 papers). Akio Hirai collaborates with scholars based in Japan, United States and Slovakia. Akio Hirai's co-authors include Kunio Kaiho, Kazue Tazaki, Ryoshi Ishiwatari, Tetsuya Arinobu, Nobuyori Takeda, Yoshimichi Kajiwara, Hisatake Okada, Hugh E. G. Morgans, Hideki Wada and Nobuaki Niitsuma and has published in prestigious journals such as Organic Geochemistry, Clays and Clay Minerals and Japanese Journal of Ichthyology.

In The Last Decade

Akio Hirai

16 papers receiving 317 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Akio Hirai Japan	10	182	105	70	62	56	16	347
Haoru Chen China	12	33 0.2×	72 0.7×	89 1.3×	50 0.8×	46 0.8×	24	389
R. D. Norris United States	6	235 1.3×	156 1.5×	105 1.5×	35 0.6×	35 0.6×	11	361
Aureal T. Cross United States	10	189 1.0×	97 0.9×	58 0.8×	57 0.9×	29 0.5×	18	385
E.A. Merewether United States	10	153 0.8×	136 1.3×	41 0.6×	105 1.7×	73 1.3×	30	337
Vasileios Karakitsios Greece	14	216 1.2×	151 1.4×	77 1.1×	105 1.7×	90 1.6×	24	457
Thomas D. Fouch United States	11	218 1.2×	118 1.1×	59 0.8×	150 2.4×	99 1.8×	31	449
H. Paul Buchheim United States	12	151 0.8×	220 2.1×	80 1.1×	48 0.8×	64 1.1×	21	370
P Ascoli Canada	5	117 0.6×	118 1.1×	64 0.9×	44 0.7×	62 1.1×	6	290
T. Markham Puckett United States	12	103 0.6×	215 2.0×	44 0.6×	65 1.0×	46 0.8×	30	404
Alan D. Partridge Australia	10	266 1.5×	199 1.9×	42 0.6×	45 0.7×	75 1.3×	16	616

Countries citing papers authored by Akio Hirai

Since Specialization

Citations

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

Fields of papers citing papers by Akio Hirai

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Akio Hirai

This figure shows the co-authorship network connecting the top 25 collaborators of Akio Hirai. A scholar is included among the top collaborators of Akio Hirai 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 Akio Hirai. Akio Hirai is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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16 of 16 papers shown

Chino, Naoko, Tatsuki Yoshinaga, Akio Hirai, & Takaomi Arai. (2008). Life history patterns of silver eels Anguilla japonica collected in the Sanriku Coast of Japan. 32(1). 54–56. 5 indexed citations

Hirai, Akio, et al.. (2002). Petroleum system in the Offshore Joban Basin, northeast Japan. Journal of the Japanese Association for Petroleum Technology. 67(1). 62–71. 21 indexed citations

Suzuki, Noriyuki, et al.. (2001). Source rock lithology prediction based on oil diacholestane abundance in the siliceous-clastic Akita sedimentary basin, Japan. Organic Geochemistry. 32(7). 877–890. 14 indexed citations

Niu, Ben, et al.. (2000). Smectite Diagenesis in Neogene Marine Sandstone and Mudstone of the Niigata Basin, Japan. Clays and Clay Minerals. 48(1). 26–42. 18 indexed citations

Kaiho, Kunio, Yoshimichi Kajiwara, Kazue Tazaki, et al.. (1999). Oceanic primary productivity and dissolved oxygen levels at the Cretaceous/Tertiary Boundary: Their decrease, subsequent warming, and recovery. Paleoceanography. 14(4). 511–524. 63 indexed citations

Akiyama, Masahiko & Akio Hirai. (1997). Maximum paleotemperature gradient using vitrinite reflectance mainly of the government MITI exploratory test wells.. Journal of the Japanese Association for Petroleum Technology. 62(1). 69–79. 5 indexed citations

Kaiho, Kunio, Tetsuya Arinobu, Ryoshi Ishiwatari, et al.. (1996). Latest Paleocene benthic foraminiferal extinction and environmental changes at Tawanui, New Zealand. Paleoceanography. 11(4). 447–465. 122 indexed citations

Hirai, Akio, et al.. (1995). Organic geochemical relationship between pooled oils and distribution of their source rocks in the Niigata basin, Japan.. Journal of the Japanese Association for Petroleum Technology. 60(1). 87–97. 9 indexed citations

Hirai, Akio. (1993). Fine Structure of the Egg Membranes in Four Species of Pleuronectinae. Japanese Journal of Ichthyology. 40(2). 227–235. 16 indexed citations

10.

Matsumoto, Genki I., et al.. (1990). Organic geochemistry of the McMurdo Dry Valleys soil, Antarctica. Organic Geochemistry. 16(4-6). 781–791. 19 indexed citations

11.

Ogawa, K., et al.. (1989). Analysis of emotions for moving things. The Japanese Journal of Ergonomics. 25(4). 243–251. 10 indexed citations

12.

Hirai, Akio. (1988). Fine structures of the micropyles of pelagic eggs of some marine fishes. Japanese Journal of Ichthyology. 35(3). 15 indexed citations

13.

Hirai, Akio & Tadashi Yamamoto. (1986). Micropyle in the developing eggs of the anchovy,Engraulis japonica. Japanese Journal of Ichthyology. 33(1). 11 indexed citations

14.

Hirai, Akio, et al.. (1981). Seasonal Occurrence of Milkfish Fry at Tanegashima and Yakushima in Southern Japan. Japanese Journal of Ichthyology. 28(1). 45–51. 6 indexed citations

15.

Hirai, Akio, et al.. (1980). Records of Milkfish, Chanos chanos (FoRssKÅL) from Mainland Japan. Nagasaki University's Academic Output SITE (Nagasaki University). 48. 13–18. 4 indexed citations

16.

Hirai, Akio, et al.. (1980). Geographical Occurrence of Milkfish, Chanos chanos (FORSSKÅL) Fry in Southern Japan. Nagasaki University's Academic Output SITE (Nagasaki University). 48(48). 19–26. 9 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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