Recently someone asked a question about converting between Japanese and Western calendar dates. Tsuyoshi Ito suggested it was inappropriate because it was not language related (ref: this question). I disagree because it is uniquely related to Japanese culture and mastery of the language.
IMO there are many more things in store just like this. More people will be attracted to JLU specifically because these "not in a textbook" questions can be asked. If we restrict ourselves to becoming a grammar/vocab Q&A site it will lead to a very swift death.
We already know how important context is in comprehending Japanese. So many "different" ways to do things, and many that do not fall within the boundaries of grammar or vocab questions.
Certainly we should restrict things too far from the center, but how about this as an addendum to the FAQ? "Cultural questions on matters unique to Japan and important for understanding the language are acceptable" ?
Is this appropriate for Japanese Language & Usage?
Update: Time to build a consensus!
Please check this answer below: Should uniquely cultural questions be acceptable?
and give your vote on whether it constitutes an acceptable consensus answer to this question (if not, please explain why).
For more info, see: Building our FAQ!