Well, of course no one like price increases.
But, all of you have forgotten one major factor:
The Yen has increased compared to the Dollar by about 45% over the last two years.
Then the rising prices for energy. It is not only oil. In Japan all nuclear plants have now been tomporarily shut down (result of the Fukushima catastrophe). That increased energy prices there further.
Fuji is not responsible for all that.
But of course the costs of their film production is suffering from that.
Considering all these factors a 20% price increase is quite low/moderate.
If I compare the current prices after this increase with film prices 15 years ago and consider inflation during this period, than film is not more expensive compared to former times.
By the way: Here in Germany AgfaPhoto Precisa CT 100 slide film is sold for only 6,45€ for a double pack of two 135 films at dm drugstores.
This film is now made by Fuji, and almost identical to Provia 100F (maybe it is Fuji Trebi, the amateur version of Provia).
You pay less for this excellent slide film than for 100 ISO color negative film.
Some online stores like Foto Brenner and Nordfoto are selling it, too.