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Japanese insurer Millea Holdings Inc. (8766.T) said on Thursday it will voluntarily have its shares delisted from the U.S. Nasdaq market and stop reporting its earnings under U.S. accounting rules to save costs.

Millea, a holding company with both life and non-life insurance operations, also announced plans to buy back up to 7 million of its own shares, or 31 billion yen ($253 million) worth. That is equal to about 0.8 percent of its outstanding shares.

Several foreign companies have recently delisted their shares from U.S. exchanges due to the high cost of maintaining a listing and complying with the Sarbanes-Oxley Act, a set of tough accounting laws enacted to combat fraud after the Enron scandal.

Yahoo!.com: Japan insurer Millea quits Nasdaq, U.S. accounting

U.S. accounting overseers voted Thursday to streamline rules for auditors’ assessments of corporate financial statements, in a move that supporters say will save time and simplify burdens imposed by the 2002 Sarbanes-Oxley Act.

By unanimous vote, the five members of the Public Company Accounting Oversight Board approved a new standard directing accounting companies to focus their audits of internal financial controls on the most important risks.

Under Section 404 of the Sarbanes-Oxley Act, public companies are required to test and report their procedures for catching financial misstatements and fraud. The law was approved in the wake of accounting scandals that brought down companies like Enron and WorldCom.

But Section 404 of the act came in for heavy criticism from companies who said it cost large amounts of time and money by requiring extensive and sometimes unnecessary checks on financial reporting. It’s also been the cause of hang- wringing among some lawmakers and experts who claim it’s partly responsible for making U.S. capital markets less attractive to foreign companies, who fear the heavy compliance burden of the law.

Nasdaq: UPDATE: Accounting Board Streamlines Sarbanes-Oxley Rules

US stock market regulation has little impact on where small companies decide to list their shares, according to a report from three North American academics. The widespread perception that the US’s Sarbanes-Oxley legislation is one reason why so many international companies have chosen to list in the UK is out of touch, the report argues.

Andrew Karolyi and Rene Stulz of Ohio State University and Craig Doidge of the University of Toronto say that although the regulatory burden on smaller companies has increased thanks to Sarbanes-Oxley, there has been no marked increase in US companies seeking a foreign listing.

However, the fact that all 67 US companies listed on the Alternative Investment Market in London have floated since the introduction of Sarbanes-Oxley indicates the opposite, and the proliferation of foreign companies seeking a UK listing highlights the attractions of London.

The Independent: Small Talk: AIM is working, despite the disasters