The Finance Ministry's Tax Commission on Friday unveiled a reform outline that would allow corporations to write off investments and spending on research and development.

The commission is an official advisory panel to the Finance Minister. It is separate from the Council on Economic and Fiscal Policy, chaired by Prime Minister Junichiro Koizumi, which is also working toward tax reform.

The council is supposed to set only basic economic policy, while the commission comes up with the details. However, the two bodies are often at odds, as they are over corporate tax reform.