Assuming that prices will fall if consumption tax is removed is fatally flawed, as companies charge what they think the market will bear. There was certainly no reduction in the prices of imports when the yen rose to almost twice its current level 15 years ago (apart from the occasional half-hearted 円高還元感謝セール in Kaldi).
Let's take chocolate in Japan as an example, the price of which has roughly doubled as a result of a price spike in the bean.
Except, as you can see from the graph below, the price spike is over (despite the
very recent news stories about how manufacturers are being forced to pass on higher cocoa prices to consumers through more expensive Valentine's chocolates). Prices are back at their long-term levels, but I would be very surprised if manufacturers lower their prices now that people have got used to more expensive chocolate.
The fact that prices of different companies' products are often identical (beer in convenience stores) suggests that manufacturers collude, and it is highly likely they will agree to maintain current prices despite the reduction in tax. It may even hurt consumers in the long term, as companies 'regretfully' have to increase prices by 8% when sales tax is reimposed when the 2-year exemption ends.
View attachment 135411