The price for standard grade 95CL imported bull beef dropped to US$2.27 a pound this month, from US$2.38/pound last month, according to AgriHQ data.
The price for imported 90CL cow meat slipped to US$2.18/pound from US$2.20/pound.
Still, prices remain above year-earlier levels with 95CL last year at US$2.25/pound and 90CL at US$2.10/pound.
Mr Brick said the rising value of the kiwi dollar was "an extra thorn" in the side of exporters, with the local currency recently hitting its highest value against the US dollar since May 2015.
In Japan, beef imports in the year to June were at the highest level for the country since 2003, Mr Brick said.
This means New Zealand exporters will be forced to find alternate markets to divert product into, he said.
ASB Bank senior rural economist Nathan Penny said the Japanese tariff change was likely to put a spanner in the works for local beef prices.
The average beef export price in the Japan market for the September 2016 year was almost 20% higher than the next-best market, and
around 45% higher than prices in the US, he said.
Australian beef is exempt from the tariff hike on the back of its trade agreement with Japan, so New Zealand and the US will bear most of the brunt of the increase, Mr Penny said.