The benefits of Prime Minister Shinzo Abe's economic policies -- a combination monetary easing, government spending and promised structural reforms -- seem to be shining through most apparently in corporate earnings. But with the yen's weakening appearing to have run its course, and much of the hard work of "Abenomics" -- namely structural reforms -- still ahead, can Japanese companies sustain their impressive performance through the remainder of the fiscal year?

Earnings results for the most recent reporting period...