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Company · Tokyo · Japan

Idemitsu Kosan (Japan)

In research, Idemitsu Kosan (Japan) stands highest in Physical Sciences (#12,182 of 12,888 worldwide), 2022–2025.

idemitsu.comROR OpenAlex
World rank, 2022–2025
#26,137
of 28,054 · #12,263 all time
Rank in Japan
#944
of 1,070
Research works
1.1k
▼ 9% vs 2013–17
Citations
17k
15.5 per fractional work
Top-10% rate
5.9%
record average 16.5%
Open access
40%
world 28%

What is Idemitsu Kosan (Japan) known for in research?

The fields where it stands highest, 2022–2025, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Physical SciencesDomain #12,182 of 12,888 6.3%65 #6967

Each strip is that field’s whole ranked pool, with the notch where Idemitsu Kosan (Japan) sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no world mark, because the world rate differs by field (from about 6% to 21% in this record).

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.46× its world share, 2 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.27× its world share, 1 worksBiochemistry, Geneti…Pharmacology, Toxicology and Pharmaceutics: 1.05× its world share, 0 worksPharmacology, Toxico…Chemical Engineering: 7.69× its world share, 2 worksChemical EngineeringChemistry: 1.37× its world share, 2 worksChemistryComputer Science: 0.21× its world share, 1 worksComputer ScienceEarth and Planetary Sciences: 1.81× its world share, 2 worksEarth and Planetary …Energy: 1.43× its world share, 1 worksEnergyEngineering: 4.23× its world share, 47 worksEngineeringEnvironmental Science: 0.28× its world share, 1 worksEnvironmental ScienceMaterials Science: 3.26× its world share, 8 worksMaterials SciencePhysics and Astronomy: 0.32× its world share, 0 worksPhysics and AstronomyHealth Professions: 0.08× its world share, 0 worksHealth ProfessionsMedicine: 0.05× its world share, 1 worksMedicineArts and Humanities: 0.62× its world share, 1 worksArts and HumanitiesDecision Sciences: 0.46× its world share, 0 worksDecision SciencesEconomics, Econometrics and Finance: 0.43× its world share, 1 worksEconomics, Econometr…Psychology: 0.15× its world share, 0 worksPsychologySocial Sciences: 0.29× its world share, 3 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Chemical Engineering, 7.7×. Every wedge is a field page.

Who are the top researchers at Idemitsu Kosan (Japan)?

Ranked on the composite score, Kenji Kawasaki, Hidetoshi Takeda and Hiroaki Nakamura lead among researchers whose main affiliation is Idemitsu Kosan (Japan).

  1. 1 Kenji Kawasaki Japan · #368,356 worldwide 92 citations · 25 works
  2. 2 Hidetoshi Takeda Japan · #623,343 worldwide 117 citations · 22 works
  3. 3 Hiroaki Nakamura Japan · #875,205 worldwide 95 citations · 43 works
  4. 4 T. Yamashita Japan · #957,783 worldwide 74 citations · 24 works
  5. 5 Tsutomu Kikuchi Japan · #1,088,942 worldwide 25 citations · 22 works
  6. 6 Toshitaka Kanai Japan · #1,118,506 worldwide 35 citations · 25 works
  7. 7 Yukitoshi Fujinami Japan · #1,597,602 worldwide 1 citations · 19 works
  8. 8 Futoshi Utsuno Japan · #1,621,522 worldwide 19 citations · 15 works
All ranked researchers at Idemitsu Kosan (Japan)

Which keywords describe research at Idemitsu Kosan (Japan)?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Nanoparticles, Friction, Vibration Analysis, Ionic Liquids, Graphene, Renewable Resources, Tribological Performance and Lubricants.

▲ more of its work than of the world’s◆ about the world’s share▼ less than the world’s

Size is fractional works in 2022–2025 in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Nanoparticles6▲ 6.1×7 topics
  2. Friction5▲ 111×2 topics
  3. Vibration Analysis5▲ 23×2 topics
  4. Ionic Liquids5▲ 22×3 topics
  5. Graphene4▲ 8.8×2 topics
  6. Renewable Resources4▲ 36×2 topics
  7. Tribological Performance4▲ 102×2 topics
  8. Lubricants4▲ 266×1 topic
  9. Tribology4▲ 182×1 topic
  10. Gear Dynamics4▲ 162×1 topic
  11. Mesh Stiffness4▲ 162×1 topic
  12. Cathode Materials4▲ 12×2 topics
  13. Mechanical Properties4▲ 5.0×9 topics
  14. Nanocomposites3▲ 5.6×7 topics
  15. Friction Reduction3▲ 143×1 topic
  16. Laser Surface Texturing3▲ 143×1 topic
  17. Lithium-ion Batteries3▲ 8.8×2 topics
  18. Polymer Composites2▲ 13×5 topics
  19. Efficiency2▲ 11×2 topics
  20. Nanocrystals2▲ 10×3 topics
  21. Optimization2▲ 6.2×5 topics
  22. Photovoltaics2▲ 17×2 topics
  23. Semiconductor2▲ 8.3×3 topics
  24. Lithium-Sulfur Batteries2▲ 18×1 topic
  25. Solid-State Electrolytes2▲ 22×1 topic
  26. CZTS2▲ 40×1 topic
  27. Surface Roughness2▲ 17×3 topics
  28. Thin-Film Solar Cells2▲ 40×1 topic
  29. Battery Technology2▲ 7.9×2 topics
  30. Semiconductors2▲ 7.4×4 topics
  31. Battery Materials2▲ 13×1 topic
  32. Nanostructured Anodes2▲ 13×1 topic
  33. Electroluminescence2▲ 56×2 topics
  34. Finite Element Analysis2▲ 8.7×3 topics
  35. CFD Simulation1▲ 16×2 topics
  36. Thermal Management1▲ 5.7×3 topics
  37. Polymer Tribology1▲ 62×1 topic
  38. Solar Cells1▲ 8.8×3 topics
  39. Wear Behavior1▲ 53×1 topic
  40. Conducting Polymers1▲ 12×2 topics

Which research topics does Idemitsu Kosan (Japan) publish most on?

By volume in 2022–2025: Lubricants and Their Additives, Gear and Bearing Dynamics Analysis, Tribology and Lubrication Engineering and Advanced Battery Materials and Technologies.

Lubricants and Their Additives: 4 fractional worksGear and Bearing Dynamics Analysis: 4 fractional worksTribology and Lubrication Engineering: 3 fractional worksAdvanced Battery Materials and Technologies: 2 fractional worksChalcogenide Semiconductor Thin Films: 2 fractional worksAdvancements in Battery …2Advancements in Battery Materials: 2 fractional worksTribology and Wear Analysis: 1 fractional worksAdvanced Battery Technologies Research: 1 fractional worksConducting polymers and applications: 1 fractional worksFermentation and Sensory Analysis: 1 fractional works
Mechanical EngineeringElectrical and Electronic EngineeringMechanics of MaterialsAutomotive Engineering2 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Lubricants and Their Additives Mechanical Engineering 4 works
  2. 2 Gear and Bearing Dynamics Analysis Mechanical Engineering 4 works
  3. 3 Tribology and Lubrication Engineering Mechanical Engineering 3 works
  4. 4 Advanced Battery Materials and Technologies Electrical and Electronic Engineering 2 works
  5. 5 Chalcogenide Semiconductor Thin Films Electrical and Electronic Engineering 2 works
  6. 6 Advancements in Battery Materials Electrical and Electronic Engineering 2 works
  7. 7 Tribology and Wear Analysis Mechanics of Materials 1 works
  8. 8 Advanced Battery Technologies Research Automotive Engineering 1 works
  9. 9 Conducting polymers and applications Polymers and Plastics 1 works
  10. 10 Fermentation and Sensory Analysis Food Science 1 works

How open and international is its research?

Against the world’s own shares — the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available39.6%not open60.4%

World: 28% of research is openly available.

with international co-authors11.2%domestic only88.8%

World: 19% is written across borders.

How has Idemitsu Kosan (Japan)'s research output changed?

Output in 2018–2022 was 9% lower than in 2013–2017.

1990200020102020
grewheldshrank

The same series as a ribbon — one cell per year, darker for more. The line above answers how much; this answers when.

Other research institutions in Tokyo

All research institutions in Tokyo

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners are in the interactive view on the map.