Oricon

Japanese corporate group that supplies statistics on the music industry

Oricon Inc. , established in 1999, is the holding company at the head of a Japanese corporate group that supplies statistics and information on music and the music industry in Japan and Western music. It started as Original Confidence Inc. , which was founded by Sōkō Koike in November 1967 and became known for its music charts. Oricon Inc. was originally set up as a subsidiary of Original Confidence and took over the latter's Oricon record charts in April 2002.

from Wikipedia