Food Prices and Increases

Food prices seem to have been on the rise recently.Or maybe Ive just been more aware of it since my new reduced contract came into force from the start of the month.
Seems there are at least two methods being employed to pass on increases to consumers and customers.
The first and most obvious is the straight price increase.Exhibit number one is the small bag of shredded cabbage in the shot above on the left hand side.Last week 100 yen.This week 108 yen.Same amount just an 8 percent increase if my math is correct.
The second method is to charge the same price but reduce the contents.I draw your attention to exhibit 2 above.The packet of coffee to the right of the cabbage.Last week a 150 gram pack cost 478 yen.This week the contents have been reduced to 130 grams.Same price 478 yen but 20 grams lighter.
I need to cut back on my coffee consumption so now i've got a ready made excuse to do so.
Then again in an attempt to avoid price hikes some companies are using cheaper ingredients in their food items substituting cheaper ones instead of increasing their prices.