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Numbering system - Japan2006-11-08 17:42:492019-05-14
Document types and kind codes
KOKAI (A, U) - enlarge
- unexamined patent publication (A)
- unexamined utility model publication (U)
KOKOKU (B, Y) - enlarge
- examined patent publication (old law) (B)
- examined utility model publication (old law) (Y)
TOROKU (B, U) - enlarge
- granted patent publication (new law) (B)
- granted utility model publication (new law) (U)
KOHYO (A, T) - enlarge
- PCT application entering national phase in Japan (A, T)
SAIKOHYO (A) - enlarge
- Japanese PCT application entering national phase in Japan (A)
Number formats
yy-nnnnnn
- two digits for the year (y)
- up to six digits for the number (n)
- application number, unexamined publication number, examined publication number (old law)
- from 2000 onwards: four-digit Western year (yyyy-nnnnnn)
nnnnnnn
- seven digit number (n), no year
- grant numbers
Japanese number formats (Patents)
OLD LAW:
- application
yy-123456
- unexamined publication
yy-123456
- examined publication
yy-123456
- registration (no publication)
no. > 1 000 000
NEW LAW (1996):
- application
yy-123456
- unexamined publication
yy-123456
- granted patent (publication)
no. > 2 500 000
first publication: 29 May 1996
document no.: 2 500 001
NOTE:
from 2000 onwards the four-digit Western year is used instead of the Japanese imperial year
Japanese number formats (Utility Models)
OLD LAW:
- application
yy-123456
- unexamined publication
yy-123456
- examined publication
yy-123456
- registration (no publication)
1~approx 2 000 000
NEW LAW (1994):
- application
yy-123456
- granted utility model publication (without examination)
no. > 3 000 000
first publication: 26 July 1994
document no. 3 000 001
Japanese imperial years vs. Western years
SHOWA (SHO, S)
reign of Emperor Hirohito
1926 to 1989
HEISEI (HEI, H)
reign of Emperor Akihito
1989 to date
REIWA (REI, R)
reign of Emperor Naruhito
1 May 2019 to date
SHOWA + 25 = Western year
HEISEI + 1988 = Western year
REIWA + 2018 = Western year
NOTE:
1) The last year SHOWA is the first year HEISEI (SHOWA 64 = HEISEI 01 = 1989).
2) The western year 2019 is until 30 April HEISEI 31, and starting from 1 May REIWA 1