I am really not convinced that the western audiences pay more attention to Japanese games in general. There were a number of great Japanese games released this year and last but sales in the west (Europe and USA) are still completely dominated by large western releases. The only outliers are mainstay Nintendo titles like Pokemon and Smash.
I think the subset of gamers that respond to Sony's marketing efforts such as us on Neogaf, people who attend PSX, Sony twitter followers etc are highly responsive to Japanese games but it would be foolish to consider this audience as the majority audience who buy games on consoles. The numbers have shown that western titles dwarf the sales of even large scale, highly marketed Japanese games in the west (outside of nintendo titles). Sony has done a great effort marketing more Japanese titles over the last couple of years but it can't really compare to titles that can easily market themselves through community such as Call of Duty, Destiny and Madden, these titles I think also resonate much more with the majority of western gamers.
I do wish more titles were localized as well and brought to the west but publishers have to spend money on marketing, localization and setting up distribution in additional territories in order to sell a title there. Consider something like Yakuza 3, sold about 200k units in the USA, probably cost upwards of 300k to localize, a similar amount to market, some money for logistics as well. Take off the cut for retail and digital delivery. In the end your profits are small to minimal. Now take into account you have limited resources available in your company and you are obliged to your shareholders to maximize profits by allocating these resources to more profitable project. This is why we don't see many of these games over here, these publishers are stupid, they have done a lot of hard calculations before deciding that it perhaps isn't worth the effort to bring certain titles over.
