Hamasaki passed customs on Sunday and was greeted by more than 100 fans, Youth Daily reported today.

She stopped to sign one autograph for a fan before she was escorted to a car by more than 20 body guards. The report said she lost the ring during this period.

Both Chinese and Japanese staff searched for the ring in the airport and the parking lot, but failed to find it. Hamasaki sent an e-mail to the newspaper last night in hopes that it could be found and returned.

The singer is in town for six days. She will perform at Shanghai Grand Stage (Shanghai Gymnasium) on October 18 and shoot a music video during her stay, the report said.