In 2008, she also had a lead role playing the title heroine's sidekick Miki in Noboru Iguchi's gore-fest The Machine Girl which premiered at the Yubari International Fantastic Film Festival in March 2008. She reprised her role (billed as Asami Sugiura) in the January 2009 V-Cinema sequel Shyness Machine Girl, although no new footage of her was shot for the short. In between, she also had a part in Yūdai Yamaguchi's horror film Tamami: The Baby's Curse released in August 2008.
Asami's November 2008 adult video with three other actresses, Three Sisters Ninja Sex, a period costume female ninja (kunoichi) piece, was the Kasakura entry for the 2009 AV Grand Prix contest. At the end of 2008 and the beginning of 2009, Media Station's Bazooka label released three elaborate historical cosplay AVs starring Asami. Asami announced her retirement from the AV industry November 8, 2008 to devote herself to mainstream acting as Asami Sugiura.