There are Japanese companies who are being progressive with game design but from everything I know within the industry, the core issue at hand is an implicit assumption that change is dangerous because japanese gamers do not want change. You can actually find quotes like this all over, from almost all high profile japanese game designers. From Software is definitely a standout, but ultimately they are just as stuck in their ways. If you look at stuff like Armored Core, they've iterated the franchise to the point where it is nearly its own reductio ad absurdum. Still not really sure how they managed to make the Souls games, but most definitely they were heavily influenced by western RPGs. Other companies like Capcom and Squeenix are trying to evolve by buying out and using a lot of western development, but trust me when I tell you that they are still trying to enforce their calcified ways and designs onto those developers. That being said, it is true that a lot of similar arguments can be leveled at big publisher development in the western hemisphere, but it is ironically sourced from a polar opposite problem: Japanese publishers are stuck in the past, assuming that gamers want nothing new when there is evidence to the contrary, whereas western publishers won't make anything new for fear that someone might not like the game.