If the rise triggers price hikes taking advantage of the tax rate rise, or if overall inflationary expectations are heightened, then the risk of a genuine inflation will arise. In particular, this risk cannot be disregarded when the supply and demand conditions for products are fairly tight.
Therefore, it is necessary to pay attention to the inflationary expectations and possible over-reactions caused by the rise in the consumption tax rate rather than paying attention to the previously-mentioned superficial hikes in prices.