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Top 100 Key Players companies in NOx
by Most Patent Citation in the Japan in 2019

The NOx top 100 is Discovery PatSnap’ annual ranking of the top 100 Most Patent Citation NOx Key Players in the Japan. Discovery has identified the top key players, startups & unicorns, fast-growings, news entrants in 2019, ranking from differnt perspectives, including patent filing intensity, academic research capability, news media heat. The company list is generated from various data types.
In atmospheric chemistry, NO x is a generic term for the nitrogen oxides that are most relevant for air pollution, namely nitric oxide (NO) and nitrogen dioxide (NO 2 ). These gases contribute to the formation of smog and acid rain, as well as affecting tropospheric ozone.

Key Players

Fast-growings

Startups & Unicorns

New Entrants

Ranking Year:

2022

2021

2020

2019

2018

Region:

Global

China

Japan

Denmark

United States

United Kingdom

Germany

South Korea

France

Sweden

Switzerland

Ranking:

Most Patent Filings

Highest Patent Value

Most Patent Citation

Most Research Publications

Most Literature Citation

Most Market Reports

Most News Heat

#
Company Name
Region
Tech Topics
Total
1
Toyota Motor Corp.
Aichi, Japan
Sport utility vehicle,Mobile device,Public transport,
...[+2]
patent citation: 15,128
2
Hitachi Ltd.
Tokyo, Japan
Elevator,Electrical equipment,Electric motor,
...[+2]
patent citation: 4,070
3
Mitsubishi Kogyo KK
Japan
patent citation: 3,844
4
Nissan Motor Co., Ltd.
Kanagawa, Japan
Truck,Public transport,Automotive engineering,
...[+2]
patent citation: 3,019
5
Hino Motors, Ltd.
Tokyo, Japan
Truck,Public transport,Gasoline,
...[+2]
patent citation: 2,295
6
Isuzu Motors Ltd.
Tokyo, Japan
Truck,Public transport,Diesel engine,
...[+2]
patent citation: 2,141
7
Mazda Motor Corp.
Kanagawa, Japan
Automotive engineering,Reciprocating engine,Manual transmission,
...[+2]
patent citation: 1,826
8
Honda Motor Co., Ltd.
Tokyo, Japan
Automotive engineering,Manufacturing engineering,Sport utility vehicle,
...[+2]
patent citation: 1,657
9
Mitsubishi Motors Corp.
Tokyo, Japan
Sport utility vehicle,Automotive engineering,Electric vehicle,
...[+2]
patent citation: 1,556
10
NGK Insulators, Ltd.
Aichi, Japan
Beryllium copper,Industrial engineering,Pottery,
...[+2]
patent citation: 1,312
11
Mitsubishi Fuso Truck & Bus Corp.
Kanagawa, Japan
Truck,Automotive engineering,Chassis
patent citation: 1,210
12
Nihon Denso KK
Saitama, Japan
Manufacturing engineering,Mechanical engineering
patent citation: 963
13
UD Trucks Corp.
Saitama, Japan
Truck,Automotive engineering
patent citation: 899
14
Tokyo Gas Co., Ltd.
Tokyo, Japan
Natural gas,Hydrogen chloride,Petroleum industry,
...[+2]
patent citation: 845
15
Ebara Corp.
Tokyo, Japan
Vacuum pump,Manufacturing engineering,Turbine,
...[+2]
patent citation: 798
16
Toyota Central R&D Labs, Inc.
Aichi, Japan
Semiconductor,Power semiconductor device,System on a chip,
...[+2]
patent citation: 792
17
DENSO Corp.
Aichi, Japan
Automotive engineering,Industrial robot,Programmable logic controller,
...[+2]
patent citation: 768
18
N.E. Chemcat Corp.
Tokyo, Japan
Cisco Catalyst,Chemical engineering,Automotive catalyst,
...[+2]
patent citation: 754
19
TOSHIBA Corp.
Tokyo, Japan
Semiconductor,Computer hardware,Electronics,
...[+2]
patent citation: 747
20
Osaka Gas Co., Ltd.
Osaka, Japan
Natural gas,Activated carbon,Petroleum industry,
...[+2]
patent citation: 720
21
Hitachi Zosen Corp.
Osaka, Japan
Mechanical engineering,Waste-to-energy,Environmental protection,
...[+2]
patent citation: 671
22
Kawasaki Heavy Industries Ltd.
Kyoto, Japan
Turbine,Mechanical engineering,Manufacturing engineering,
...[+2]
patent citation: 607
23
Panasonic Holdings Corp.
Osaka, Japan
Semiconductor,Industrial engineering,Electronics,
...[+2]
patent citation: 605
24
Matsushita Electronics Corp.
Osaka, Japan
Electronics,Computer hardware,DVD player,
...[+2]
patent citation: 605
25
Kobe Steel, Ltd.
Hyogo, Japan
Welding,Electronics,Mining engineering,
...[+2]
patent citation: 533
26
Mitsubishi Power Ltd.
Kanagawa, Japan
Turbine,Control system,Renewable energy,
...[+2]
patent citation: 521
27
NGK SPARK PLUG CO., LTD.
Aichi, Japan
Spark plug,Automotive engineering,Ceramic art,
...[+2]
patent citation: 514
28
Nippon Shokubai Co., Ltd.
Tokyo, Japan
Polymer,Acrylic acid,Chemical engineering,
...[+2]
patent citation: 494
29
Miura Co., Ltd.
Tokyo, Japan
Boiler (power generation),Water-tube boiler,Refrigeration,
...[+2]
patent citation: 480
30
IHI Power Systems Co., Ltd.
Tokyo, Japan
Turbine,Gas engine,Manufacturing engineering,
...[+2]
patent citation: 472
31
Komatsu Ltd.
Tokyo, Japan
Environmental engineering,Construction engineering,Heavy equipment,
...[+2]
patent citation: 451
32
Mitsubishi Electric Engineering Co., Ltd.
Tokyo, Japan
patent citation: 445
33
NIPPON STEEL Stainless Steel Corp.
Tokyo, Japan
Mill,Metal,Mining engineering,
...[+1]
patent citation: 440
34
NKK Corp.
Tokyo, Japan
Natural resource management,Mining engineering
patent citation: 398
35
Yanmar Co., Ltd.
Osaka, Japan
Diesel engine,Electronics,Tractor,
...[+2]
patent citation: 396
36
Mitsubishi Hitachi Power Systems
Kanagawa, Japan
Control system
patent citation: 360
37
Mitsui E&S Holdings Co., Ltd.
Tokyo, Japan
Public transport,Hydrogen compressor,Reciprocating compressor,
...[+2]
patent citation: 309
38
IBIDEN Co., Ltd.
Gifu, Japan
Electronics,Semiconductor,Asphalt,
...[+2]
patent citation: 302
39
IHI Corp.
Tokyo, Japan
Turbocharger,Manufacturing engineering,Turbine,
...[+2]
patent citation: 292
40
Idemitsu Kosan Co., Ltd.
Tokyo, Japan
Petrochemical,Lubricant,Petroleum,
...[+2]
patent citation: 287
41
Yamaha Motor Co., Ltd.
Shizuoka, Japan
Robotics,Industrial robot,Automotive engineering,
...[+2]
patent citation: 268
42
Ricoh Co., Ltd.
Tokyo, Japan
Digital media,Data visualization,Thermal paper,
...[+2]
patent citation: 255
43
Sumitomo Metal Mining Co., Ltd.
Tokyo, Japan
Nickel,Mining engineering,Natural resource management,
...[+2]
patent citation: 253
44
Sumitomo Heavy Industries, Ltd.
Tokyo, Japan
Sewage treatment,Proton therapy,Cryocooler,
...[+2]
patent citation: 245
45
Toyota Industries Corp.
Aichi, Japan
Textile,Software,Automotive engineering,
...[+2]
patent citation: 236
46
TAKUMA CO., LTD.
Hyogo, Japan
Manufacturing engineering,Agricultural waste,Boiler (power generation),
...[+2]
patent citation: 222
47
Sakai Chemical Industry Co., Ltd.
Osaka, Japan
Chemical engineering,Zinc,Titanium dioxide,
...[+2]
patent citation: 211
48
Cataler Corp.
Shizuoka, Japan
Cisco Catalyst,Automotive engineering
patent citation: 197
49
Nippon Furnace Co. Ltd.
Kanagawa, Japan
Automation,Manufacturing engineering,Industrial engineering,
...[+2]
patent citation: 194
50
Petroleum Energy Center
Tokyo, Japan
Hydrogen,Petroleum industry
patent citation: 190
51
Kubota Corp.
Osaka, Japan
Tractor,Manufacturing engineering,Combine harvester,
...[+2]
patent citation: 186
52
The Kansai Electric Power Co., Inc.
Osaka, Japan
Telecommunications,Energy management,Electric utility,
...[+2]
patent citation: 177
53
Sumitomo Metal Industries Ltd.
Osaka, Japan
Metal,Semiconductor,Casting,
...[+2]
patent citation: 174
54
Cataler Industrial Co., Ltd.
Japan
patent citation: 163
55
Tosoh Corp.
Tokyo, Japan
Petrochemical,Chemical engineering,Immunoprotein,
...[+2]
patent citation: 155
56
Horiba Ltd.
Kyoto, Japan
Semiconductor,Electronics,Hematology,
...[+2]
patent citation: 155
57
Nihon Cement Co. Ltd.
Japan
Cement,Materials science,Construction engineering,
...[+2]
patent citation: 154
58
Kawasaki Steel Corp.
Japan
patent citation: 148
59
Daihatsu Motor Co., Ltd.
Osaka, Japan
Automotive engineering,Proton exchange membrane fuel cell,Electric bus,
...[+2]
patent citation: 145
60
Japan Atomic Energy Research Institute
Japan
Basic law
patent citation: 135
61
Subaru Corp.
Tokyo, Japan
Automotive engineering,Public transport,Aerospace,
...[+2]
patent citation: 133
62
Sumitomo Electric Industries Ltd.
Osaka, Japan
Electronics,Optical fiber,Optical fiber cable,
...[+2]
patent citation: 132
63
Sumitomo Electric
Osaka, Japan
Optical fiber,Electronics,Optical fiber cable
patent citation: 132
64
Showa Denko K.K.
Chiba, Japan
Graphite,Materials science,Nanomaterials,
...[+2]
patent citation: 131
65
Canon, Inc.
Tokyo, Japan
Computer hardware,Software,Computer vision,
...[+2]
patent citation: 130
66
SANYO Electric Co., Ltd.
Osaka, Japan
Semiconductor,Computer hardware,Software,
...[+2]
patent citation: 127
67
Meidensha Corp.
Tokyo, Japan
Electrical equipment,Social infrastructure,Electronics,
...[+2]
patent citation: 126
68
Toray Industries, Inc.
Tokyo, Japan
Fiber,Textile,Textile (markup language),
...[+2]
patent citation: 124
69
TOTO Ltd.
Fukuoka, Japan
Bathtub,Cistern,Sink (computing),
...[+2]
patent citation: 120
70
Miura Institute of Research & Development Co., Ltd.
Japan
patent citation: 117
71
Cosmo Oil Co., Ltd.
Tokyo, Japan
Petrochemical,Petroleum,Syngas,
...[+2]
patent citation: 114
72
Hitachi Astemo Ltd.
Japan
Public transport,Automotive engineering
patent citation: 114
73
Suzuki Co., Ltd.
Nagano, Japan
Semiconductor,Electronics,Electronic component,
...[+2]
patent citation: 113
74
Daiichi Kigenso Kagaku Kogyo Co., Ltd.
Osaka, Japan
Refractory,Chemical engineering,Oxygen sensor,
...[+2]
patent citation: 112
75
JFE Engineering Corp.
Tokyo, Japan
Environmental protection,Renewable energy,Health care,
...[+2]
patent citation: 111
76
Sekisui Chemical Co., Ltd.
Osaka, Japan
Synthetic rubber,Industrial engineering,Polyvinyl chloride,
...[+2]
patent citation: 106
77
Sharp Corp.
Osaka, Japan
Computer hardware,Electronics,Telecommunications,
...[+2]
patent citation: 97
78
Asahi Kasei Corp.
Tokyo, Japan
Chemical engineering,Petrochemical,Fertilizer,
...[+2]
patent citation: 94
79
TOHO GAS Co., Ltd.
Aichi, Japan
LNG storage tank,Sales management,Natural gas,
...[+2]
patent citation: 94
80
Daido Steel Co., Ltd.
Aichi, Japan
Magnet,Power transmission,Ferroalloy,
...[+2]
patent citation: 90
81
Hitachi Car Engineering Co., Ltd.
Japan
Automotive engineering
patent citation: 90
82
Tokyo Electric Power Co. Holdings, Inc.
Tokyo, Japan
Power grid,Association (object-oriented programming),Electricity,
...[+2]
patent citation: 88
83
Toyo Kogyo Co. Ltd.
Japan
Metal fabrication,Automation,Manufacturing engineering,
...[+2]
patent citation: 88
84
Hitachi Construction Machinery Tierra Co., Ltd.
Osaka, Japan
Agricultural machinery,Manufacturing engineering,Mechanical engineering
patent citation: 87
85
Mitsui Chemicals, Inc.
Tokyo, Japan
Petrochemical,Chemical engineering,Polypropylene,
...[+2]
patent citation: 85
86
Central Research Institute of Electric Power Industry
Kanagawa, Japan
Electric power industry,Technology transfer
patent citation: 85
87
Noritsu Koki Co., Ltd.
Chiba, Japan
Hydroponics,Drug discovery,Ultracentrifuge,
...[+2]
patent citation: 84
88
AGC
Tokyo, Japan
Fluorine,Glazing,Chemical engineering,
...[+2]
patent citation: 83
89
Asahi Fiber Glass Co., Ltd.
Tokyo, Japan
Glass wool,Thermal insulation,Fiber,
...[+2]
patent citation: 83
90
Tonen General Sekiyu KK
Chiba, Japan
Petroleum product,Petrochemical,Liquefied natural gas,
...[+2]
patent citation: 82
91
Tokyo Roki Co., Ltd.
Kanagawa, Japan
Fuel filter,Filter (aquarium),Gasoline,
...[+2]
patent citation: 82
92
Chugai Co., Ltd.
Aichi, Japan
Automotive engineering,Electronic component,Textile
patent citation: 82
93
The Chugoku Electric Power Co., Inc.
Hiroshima, Japan
Renewable energy,Petroleum industry,Electric power transmission,
...[+2]
patent citation: 79
94
Sangi KK
Japan
patent citation: 78
95
Mitsui Chemistry Joint-stock Co.
Japan
patent citation: 77
96
Equos Research Co. Ltd.
Japan
patent citation: 76
97
Fujifilm Business Innovation Corp.
Chiba, Japan
Electronics,Inkjet printing,Vertical-cavity surface-emitting laser,
...[+2]
patent citation: 72
98
Toshiba Mitsubishi-Electric Industrial Systems Corp.
Tokyo, Japan
Variable-frequency drive,Industrial engineering,DC motor,
...[+2]
patent citation: 71
99
Konica Minolta Business Technologies, Inc.
Tokyo, Japan
Electronics,Computer hardware,Peripheral,
...[+1]
patent citation: 71
100
Advanced Industrial Science & Technology
Tokyo, Japan
Graphene,Association (object-oriented programming)
patent citation: 69

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