You responded to fans' calls to reinstate Ninja Gaiden's trademark gore in this game. In a year that saw Bioware change the ending to Mass Effect 3 after a fan campaign, do you think the easy access for consumers offered by networks like Twitter is a positive or negative thing for developers?
Yasuda: I think the fact that information like that - whether good or bad - can reach us directly is definitely a positive thing. As a developer, I need to figure out what's at the core of the comment and accept it, and then create something that exceeds players' expectations.
Do you feel as though the release of more adult, "hardcore" games like Ninja Gaiden and ZombiU signals a new direction for Nintendo?
Yasuda: There are still familiar titles like Mario, so rather than changing direction, I feel they are trying to broaden the audience.
There seems to be a parallel between your work on Ninja Gaiden and Metroid: Other M, as both introduced a character-led aspect to games that had traditionally simply focused on action. Was that a conscious decision?
Yasuda: Yeah, I guess there are similarities in the way stories are told, with a strong focus on character. However, that isn't intentional. I think Ninja Gaiden has a much stronger focus on the action.
Do you feel as though action games need a more human side?
Yasuda: I think they do need a more human side. As long as the story doesn't get in the way of the action, that is.
Is the move towards a more character-led storyline in your games a way to interest Western gamers?
Yasuda: It's just another way to portray Ryu Hayabusa as the ultimate ninja and to enhance the player's sense of immersion and connection with the character they are controlling.
What are you working on now? Will it be on Wii U?
Hayashi: We are working on an action game, and we are looking into other titles for Wii U.