"a leading indicator of Japanese consumer demand that relies on two of the most common items on a sushi menu: Japanese horse mackerel and tuna.....shows how much the average Japanese family is spending on tuna relative to mackerel...consumer spending on “small extravagances” like sea urchin, or “uni,” and musk melons have also been trending up since the middle of 2012."
Source: Sushi’s Abenomics wave: posh tuna in, plain mackerel out
Thursday, May. 23 2013,
The Globe and Mail