There is an interesting discussion at a Japanese blog on Oricon sales reporting vs Soundscan and how exactly do they gather their sales data. The blogger summarized the issue in English as follows:
The freelance entertainment writer Ugaya Hiro who has written 3 books on Japanese music scene was quoted in a short interview by another paper of his doubts on the data collection methods of Oricon.
Since then, Oricon has sued the Ugaya in the quote for 50 million yen. http://www.rsf.org/article.php3?id_article=20981
This is Ugaya's site appealing to everyone to write to Oricon.http://ugaya.com/
This blogger followed up with a translation of an article by Nikkei Entertainment which objectively outline the ins and outs of data collection. Nikkei alleged that Oricon sales has numbers that are so different from Soundscan that a general pattern could be seen. Oricon sales has idol groups especially Johnny Jimusho's topping the charts when Soundscan which gather data from point of sales and not live venue sales, internet sales has the same groups always lower than indie artists.
Two examples were Mr. Travelling Man of TOKIO and Endlicheri Endlicheri's album.
Mr. Travelling Man was no. 1 in Oricon but lost to Janne Da Arc's "Turning Back" album by 20,000 copies in the same week at Soundscan.
Kinki Kids' Tsuyoshi Domoto's Endlicheri Endlicheri of July 2, 2006 beated Pornograffiti on Oricon by 893 but on Soundscan, Pornograffitti defeated Endlicheri by 16,000 copies.
Pls do not reproduce this blogger's entire article at your blog or forum. Just give the link. Don't forget to read all the comments.http://www.pliink.com/mt/marxy/archives/20...i-entertai.html
The blogger does not believe Kinki Kids could muster a second week no. 1 in Oricon either.
Cross posted at TOKIO, Record Sales of Kinki Kids, JE thread, J-pop, Album Sales, Trends