As reported in this blog, Counter Vailing Duty ("CVD") of Hynix DRAM made in Korea was abolished as of April 23. No more CVD in importing into Japan.
One important topic for this CVD is the paid CVD can be refunded to importers in Japan.
As CVD is a counter-measure to the subsidy to Hynix by Korean governmental financial institute, in order to make the industry competitiveness equal status, Japanese decided to impose CVD to Hynix Korea DRAM. However, based on the protest by Hynix, Japanese government have re-investigated whether the duty rate of CVD was appropriate or not.
The result is that there is no more ground of CVD in current situation, and the effect of the subsidy was disappeared in some years ago, CVD was abolished.
The refund of the CVD is the amount of difference between actually paid CVD and "should-be CVD amount", which is, e.g. JPY3.98 per 256MB per item. (Please be noted the actual calculation should be more complicated based on the procedure sheet by Customs.)
As the implementation of CVD was first time in history in Japan, not many of traders know this refund system. Although the check of paid CVD result and the calculation of the refund would be complicated and troublesome, it would be worth while doing so for traders who paid CVD a lot.
(Source: Cabinet Order to abolish CVD: http://www.customs.go.jp/kaisei/seirei.htm#H21s122
Report of investigation of CVD: http://www.customs.go.jp/kaisei/kokuji/H21kokuji/H21kokuji0140.pdf
Procedure of refund of CVD: http://www.customs.go.jp/kaisei/tsutatsu/H21tsutatsu/H21tsutatsu0476.pdf )