I'm asking this question largely as a safety net, in case there's something I'm not seeing that's going under the radar.
I got a job recently in Japan, and I received a visa to be able to work there. As an American, I got the visa at a Japanese consulate in the US. They attached it and another, folded document inside the passport (The folded document was the CoE 'Certificate of Eligibility'). They said basically to just take that passport over there within three months to enter Japan.
Is there anything else I need to do before then to prepare for the immigration officers (and anybody else similar to that), to be allowed in? Are there any other documents or items that are needed? Even if not, do I need to plan to have any particular answers ready or anything else to get through immigration? Do I need to be in a suit and tie or anything?
As far as I can tell, I can dress casually, just show them the passport, maybe have a booking confirmation for my hotel with me, smile and be polite, and then I can expect it to go smoothly. Is that so?
Wow, that was easy to deal with! I entered the country a few days ago, and @jpatokal 's answer was exactly the situation I encountered. The immigration officer asked me to double-check or confirm a couple of things, mainly what all of them were doing, but I don't remember being asked anything subjective or really meaningful. It was far from an interview, and I was done with her in maybe five minutes. So thanks for both answers!