<2021-JP> Firm Ranking of the number of Japanese granted patents in the IT field in 2021

2022.09.20 2022.09.20

The following table shows the ranking of Japanese IP law firm. The ranking is based on the following conditions.

Technical field: IT (information technology, computer Software, computer program, method using software, etc.)
Status: Japanese granted patents in 2021 (registration date).
First country: Japan (i.e., (i) patents with claiming priority of a Japanese application, (ii) patents based on Japanese domestic application, or (iii) patents based on PCT application whose receiving office is Japan Patent Office without claiming any priority).
Count: The number of patents handled by each Japanese IP law firm was counted (if the applicant is represented by a firm member (attorney), it was counted as being handled by the firm).

Ranking	No.	IP law firm	Website
1	1582	Sakai International Patent Office	View
2	702	SHIGA International Patent Office	View
3	555	ITOH International Patent Office	View
4	322	SUZUYE & SUZUYE Intellectual Property Law	View
5	321	TAIYO, NAKAJIMA & KATO	View
6	317	SOCO IP LAW FIRM	View
7	311	Ohtsuka Patent Office	View
8	277	In-house patent attorney	－
9	229	TMI Associates	View
10	205	In-house patent attorney	－
11	188	Fukami Patent Office, P.C.	View
12	178	HIBIKI IP LAW FIRM	View
13	146	Asahi Patent Firm	View
14	144	KOKUBUN INTERNATIONAL PATENTS & TRADEMARKS	View
15	143	KOHNO & KOHNO	View
16	138	IP Firm SHUWA	View
17	136	YKI Intellectual Property Attorneys	View
18	125	MIZOI INTERNATIONAL PATENT FIRM	N/A
19	122	Koyo International Patent Firm	View
20	119	Suzaku IP Attorneys	View
21	117	HARAKENZO WORLD PATENT & TRADEMARK	View
22	116	Shobayashi International Patent &Trademark Office	View
23	115	NII Patent Firm	View
24	115	Serio Patent & Trademark Attorneys	View
25	110	SUNNEXT International Patent Office	View
26	110	SEIWA PATENT & LAW	View
27	109	Prezio IP Firm	View
28	108	TANI & ABE, p.c.	View
29	108	Seiryo Intellectual Property Corp.	View
30	107	PRIMEWORKS IP Attorneys	View
31	104	Fuso Patent Firm	View
32	104	One ip	View
33	104	TOU-OU PATENT FIRM	View
34	102	Nishikawa & Associates	View
35	102	Isono International Patent Office, P. C.	View
36	99	In-house patent attorney	－
37	99	ONDA TECHNO Intl. Patent Attys	View
38	99	S & S INTERNATIONAL PPC	View
39	98	IPTech	View
40	93	Soei Patent & Law Firm	View
41	93	Nagoya International Patent Firm	View
42	92	SUNRISE PATENT OFFICE	View
43	92	Isshiki & Co.	View
44	89	A.SAKAI & ASSOCIATES	View
45	87	Haruka Patent & Trademark Attorneys	View
46	86	IRD Patent Office	View
47	82	SUGIMURA & Partners	View
48	80	Ashida & Kimura	View
49	79	RYUKA IP LAW FIRM	View
50	74	Minami Aoyama Patent and Trademark Attorneys	View

In preparing the table, a patent search expert conducted a patent search using patent classification and keywords (as necessary) in order to extract patents in specific technical field (here, IT field).
In the patent search, it was confirmed that a high-accuracy population (i.e., a population not including non-relevant fields) of patents was obtained. Subsequently, the population was used to create the table.

By entering the Firm name or Attorney name in the "Legal Representative Name" column of Patentscope (search system of WIPO), you can find the patent information handled by each Firm.