The girl is believed to have provided sexual services to some 70 customers by mid-August.
A notebook in which the girl wrote in Thai has been found at the massage parlour.
The notebook describes the girl sleeping alone at the parlour, with no internet access, and feeling so lonely that her hands, arms and legs shook from fear.
The girl returned to Thailand on December 26.
The police have served a fresh arrest warrant on Masayuki Hosono, 52, the owner of the parlour, on suspicion of letting female workers, including the girl, work illegally in violation of the immigration control and refugee law.
[Copyright The Jiji Press, Ltd.]
AloJapan.com