Takumi Oshima

1.8k total citations
117 papers, 1.4k citations indexed

About

Takumi Oshima is a scholar working on Organic Chemistry, Materials Chemistry and Physical and Theoretical Chemistry. According to data from OpenAlex, Takumi Oshima has authored 117 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 97 papers in Organic Chemistry, 34 papers in Materials Chemistry and 21 papers in Physical and Theoretical Chemistry. Recurrent topics in Takumi Oshima's work include Fullerene Chemistry and Applications (35 papers), Organic Chemistry Cycloaddition Reactions (22 papers) and Carbon Nanotubes in Composites (18 papers). Takumi Oshima is often cited by papers focused on Fullerene Chemistry and Applications (35 papers), Organic Chemistry Cycloaddition Reactions (22 papers) and Carbon Nanotubes in Composites (18 papers). Takumi Oshima collaborates with scholars based in Japan, United States and United Kingdom. Takumi Oshima's co-authors include Ken Kokubo, Toshikazu Nagai, Kenji Matsubayashi, Hiroya Takada, Naohiko Ikuma, Hisae Aoshima, Akihiko Tsuda, Hiroshi Ueno, Naoki Kobayashi and Eiko Mochizuki and has published in prestigious journals such as Journal of the American Chemical Society, SHILAP Revista de lepidopterología and ACS Nano.

In The Last Decade

Takumi Oshima

112 papers receiving 1.4k citations

Peers

Countries citing papers authored by Takumi Oshima

Since Specialization

Citations

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

Fields of papers citing papers by Takumi Oshima

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Takumi Oshima

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

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Salvage of dislodged percutaneous nephrostomy catheter through the original tract: feasibility and factors affecting technical failure of reinsertion 2025 ·Abdominal Radiology ·(unknown), (unknown), Shunsuke Sugawara, (unknown), (unknown), Takumi Oshima	0
2	Risk factors of non-diagnostic percutaneous liver tumor biopsy: a single-center retrospective analysis of 938 biopsies based on cause of error 2024 ·Japanese Journal of Radiology ·(unknown), Miyuki Sone, Shunsuke Sugawara, (unknown), Takumi Oshima, (unknown), (unknown), (unknown), Yoshiyuki Matsui, Yasuaki Arai, Masahiko Kusumoto	1
3	Pancreatic hamartoma: Possibility of a preoperative diagnosis via endoscopic ultrasound–guided fine‐needle aspiration biopsy 2023 ·Diagnostic Cytopathology ·(unknown), (unknown), Takumi Oshima, Kenta Suzuki, Keiko Fujii, (unknown), (unknown), Iichiroh Onishi, Ken Shimada, Kenichi Ohashi	1
4	Efficacy of Single Energy Metal Artifact Reduction (SEMAR) for Head and Neck Cancer 2019 ·Takumi Oshima, Junichi Tsuchiya, Ukihide Tateishi	0
5	Takayasu arteritis: clinical importance of extra-vessel uptake on FDG PET/CT 2019 ·SHILAP Revista de lepidopterología ·Junichi Tsuchiya, Daisuke Tezuka, Yasuhiro Maejima, (unknown), Takumi Oshima, (unknown), Kenzo Hirao, Mitsuaki Isobe, Ukihide Tateishi	2
6	A case of medial pterygoid muscle metastasis of lung cancer presenting with trismus 2019 ·International Cancer Conference Journal ·Takumi Oshima, Hirofumi Kuno, Kotaro Sekiya, Hayato Tomita, Tatsushi Kobayashi, Masahiko Kusumoto	1
7	Kinetic Study of the Diels–Alder Reaction of Li⁺@C₆₀ with Cyclohexadiene: Greatly Increased Reaction Rate by Encapsulated Li⁺ 2014 ·Journal of the American Chemical Society ·Hiroshi Ueno, Hiroki Kawakami, Koji Nakagawa, Hiroshi Okada, Naohiko Ikuma, Shinobu Aoyagi, Ken Kokubo, Yutaka Matsuo, Takumi Oshima	78
8	Dramatic Mechanistic Change in Acid‐Catalyzed Arylation of Azafulleroids Depending on their Ambident N/C Basicity: Formation of Cyclopentene Centered Pentakisadduct 2014 ·Chemistry - An Asian Journal ·Naohiko Ikuma, (unknown), (unknown), Tsubasa Mikie, Ken Kokubo, Takumi Oshima	6
9	Radical-scavenging Ability of Hydrophilic Carbon Nanoparticles: From Fullerene to Its Soot 2013 ·Fullerenes Nanotubes and Carbon Nanostructures ·Ken Kokubo, (unknown), Yuji Nakamura, Hiroshi Ueno, Takumi Oshima	9
10	Ionic conductivity of [Li+@C60](PF6−) in organic solvents and its electrochemical reduction to Li+@C60˙− 2013 ·Chemical Communications ·Hiroshi Ueno, Ken Kokubo, Yuji Nakamura, Kei Ohkubo, Naohiko Ikuma, Hiroshi Moriyama, Shunichi Fukuzumi, Takumi Oshima	28
11	Synthesis of a new class of fullerene derivative Li+@C60O−(OH)7 as a “cation-encapsulated anion nanoparticle” 2013 ·Nanoscale ·Hiroshi Ueno, Ken Kokubo, Eunsang Kwon, Yuji Nakamura, Naohiko Ikuma, Takumi Oshima	10
12	First synthesis and aggregation behaviour of periconjugated triazoliumfullerene 2013 ·Chemical Communications ·Naohiko Ikuma, (unknown), Ken Kokubo, Takumi Oshima	8
13	Versatile Domino Rearrangement of Diphenylhomobenzoquinone Epoxides Induced by CF₃SO₃H 2012 ·European Journal of Organic Chemistry ·Haruyasu Asahara, Satoshi Matsui, (unknown), Naohiko Ikuma, Takumi Oshima	6
14	Facile and scalable synthesis of a highly hydroxylated water-soluble fullerenol as a single nanoparticle 2010 ·Nano Research ·Ken Kokubo, (unknown), Naoki Kobayashi, Hisae Aoshima, Takumi Oshima	108
15	AlCl₃-Catalyzed Tandem Acetylation of Hydroarylated [60]Fullerenes 2008 ·Organic Letters ·Ken Kokubo, (unknown), Mai Kato, (unknown), Takumi Oshima	14
16	Mechanistic evidence for remote π-aryl participation in acid-catalyzed ring opening of homobenzoquinone epoxides 2008 ·Chemical Communications ·Takumi Oshima, Haruyasu Asahara, (unknown), (unknown)	7
17	Two conformers of 10,11-dihydro-5H-dibenzo[a,d]cycloheptene spiro-linked with homobenzoquinone epoxide 2006 ·Acta Crystallographica Section C Crystal Structure Communications ·Haruyasu Asahara, (unknown), Eiko Mochizuki, Takumi Oshima	2
18	Reaction of Quinones with Diazoalkanes and Some Synthetic Application 2003 ·Journal of Synthetic Organic Chemistry Japan ·Ken Kokubo, Takumi Oshima	0
19	Reaction of vinylcarbenoids with cyclic disulfides: Formation of 1,3-insertion products as well as 1,1-insertion products 1998 ·Tetrahedron Letters ·Masashi Hamaguchi, (unknown), Takumi Oshima	16
20	Solvent effects on circular dichroism induced in aroylarenecarboxylic acids by optically active amines 1974 ·Journal of the Chemical Society Perkin Transactions 2 ·Niichiro Tokura, Toshikazu Nagai, Shunsuke Takenaka, Takumi Oshima	5

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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