Is there any word out at the moment in regards to the English version of the game allowing any level of Japanese language input? If so, I'm incredibly relieved I won't have to suffer with romaji input being the best I can do. On the other hand, if this is not the case, as I will not be in the alpha or beta, may I humbly request anyone who plans to be a part of it to note this to SE as it will be far easier implementing it on an early level rather than at a much later stage?
No need to break the NDA if you're in the alpha and respond with unreleased information. But if you're a part of it, instead of responding to this post, just take the small time to make this simple request directly to SE.