> there aren't many countries where corporation tax is above 35%... Japan comes to mind

Japan's is only slightly higher, at 35.64%:

http://www.kpmg.com/global/en/services/tax/tax-tools-and-res...

but that will actually be cut below 30% in the near future:

http://money.cnn.com/2014/06/24/news/economy/japan-abenomics...