Japan's powerhouse domestic label Avex Group Holdings announced the line-up for the ninth edition of its touring festival, a-nation.

The festival once again features a mix of Avex's top acts and up-and-coming artists. In 2010 the event casts a wide net in Japan with stops in Tokyo, Osaka, Nagoya and Ehime prefecture.

Leading the way is the perennial chart-topper Ayumi Hamasaki, who has been Avex's premier act since 1999. Her single "Days/Green" came in at No. 24 on the Billboard Japan Hot Singles Sales year-end 2009 chart.

Avex's other long-time artist Kumi Koda is scheduled for four of the six shows of the touring festival. Koda's recent album, "Driving Hits 2," debuted at No. 6 on the Billboard Japan Top Albums on April 12.

Fast-rising stars on the bill include Iconiq, who recorded previously as Ayumi Lee in the Korean girl group Sugar, and released her first single under the present moniker on Dec. 9, 2009. On March 22, Iconiq's single "Bye Now" reached No. 8 on the Billboard Japan Hot 100 chart.

Other artists will include Ai Otsuka, Girl Next Door, TRF and Do as Infinity. The festival will hit Ehime's Ninjinia Stadium on Aug. 7, Nagoya's Port Messe Outdoor Arena on Aug.14, Osaka's Nagai Stadium on Aug. 21 and 22 and Tokyo's Ajinomoto Stadium on Aug. 28 and 29.