Grocery shopping in Japan

We did some grocery shopping. I bought another blood pressure gauge. I left the old gauge in SG. The new one is $30 ($50) cheaper than the old gauge ($79). I need it to monitor my BP.
There were other groceries besides the ones shown above. The freshly baked loaf of bread is worth waiting for ($3). The bakers bake this type of bread 3 times a day and so one has to be there at the right time or else they will be sold out.
The big prawns are so cheap and fresh (recommended for sashimi too) and 9 pieces cost a mere $8 (90cts each). In SG, a similar size one would have cost $2 each.
The fresh pork ($4) will be fried with ginger for our lunch today.

Guardian Pharmacy sells the above blood pressure guage about $17 less ($79) than Unity which usually gives senior citizen some discounts. I was almost conned into buying it from Unity had I not checked the price with Guardian which has a store in the same shopping mall.