The Recording Industry Association of Japan (RIAJ) has released data for sales of digital music for the first three quarters of 2010, January through September, and the overall market is down again.

Overall the digital music market value for the three quarters totaled 65 billion yen ($779.2 million), down 4% in value compared with the same nine-month period last year. The total number of digital units delivered was 334.3 million, down 5% compared to the same period last year.

Mobile music sales, the lion's share of the market, were down 6% in volume, moving 297.6 million units, and sales revenue fell 4% to 56.6 billion yen ($678.4 million). Single track mobile download sales experienced their first decline over a nine-month period. Sales fell 2% by volume and revenue; 104 million tracks were sold for 35.8 billion yen ($429 million).

There were 36.6 million Internet music downloads during the period, up 5% on the same period from last year. However the revenue generated came in at 7.5 billion yen ($89.9 million), flat compared with the first three quarters of 2009.