Japanese clients of MRI International Inc., a U.S. investment company suspected of mismanaging assets, filed a complaint Thursday with Tokyo prosecutors and police alleging fraud.

The complaint against Edwin Fujinaga, president of Las Vegas-based MRI, was filed with the Tokyo District Public Prosecutor's Office and the Metropolitan Police Department, according to a group of 60 lawyers led by Hiroshi Yamaguchi.

Regulators last month stripped MRI of its registration to operate in Japan after finding that it failed to properly manage assets and falsified business reports. As much as ¥130 billion in client funds may be missing, the Nikkei financial newspaper reported last month.