I am going to do research in Japan for 4 months, as such I want to ask questions about Japanese academia. How broad can I make my question? For example:
What do I need to know before travelling to Japan for an academic fellowship?
is an open ended question, that has an infinitude of potentially correct answers, and thus doesn't really fall inside your guidelines.
How does British academia differ from Japanese academia with respect to etiquette and other social niceties?
is a very broad question, but is likely to give long, high quality answers that explain "how", and invites experience based answers. However it doesn't really tell me what I need to know (i.e. what's going to trip me up when I go there), and if you remove the 'academia' part, it's non-obvious that the question remains specific to the site (as presumably the differences between Japanese academia and British academia are massively overshadowed by the general differences between British and Japanese culture).
Do I need to bring omiyage for my host on a first meeting?
is specific, but as I am unfamiliar with Japanese culture I don't know what questions I need to ask, so it doesn't answer my real question of what do I need to know. Furthermore I'll end up asking a large number of questions, most of which will have insignificant answers, as I don't know in advance what will be different.
What questions should I ask on Academia.SE before I go to Japan for 4 months to prevent embarrassing myself?
technically fits your guidelines (although it is a bit poll-y) but it's a bit too meta for my taste and is likely to give bad answers.
What are some good resources for preparing to study in Japan?
is obviously just asking for short, link-based answers, and even though it is probably helpful to me (although Googling hasn't really found me anything massively helpful) it isn't a high-quality question.
How can I ask my question in a way that I get answers that are useful to other people planning short-term study in Japan (something the Japanese government is actively promoting, and thus something useful to a large number of others)? Is this an appropriate venue for such a question at all? Is this question always going to fall under the category of too-localised?