A group of 15 suspected Japanese scammers arrested last week in Thailand acquired more than ¥225 million ($2 million) in illegal proceeds in February and March alone, Thai police and other sources said Tuesday.

Records seized in a March 30 police raid on a rented upscale house in the seaside resort town of Pattaya show that the suspects scammed victims in Japan of some ¥136.86 million between Feb. 1 and 24, and another ¥89 million during March.

The records show the highest value of what was described as "sales" in any one day in February was ¥14.04 million and the lowest was ¥2.74 million.