Well, if you have a co-GM, you could probably ask him or her for help or suggestions.
If you don't, have you tried collaborating with your group for names? I've found that if you're apathetic or don't have a strong preference for something when it comes to names, it's nice for your group to collaborate together on locations, what is included, where things are, and so on. Ask them what kind of rooms or buildings would be useful, what names to give those places.
Another option is to look up an anime, Japanese drama, or one of those Japanese dating sims and just use the names straight from there... that, or use it as inspiration and change things just a little bit.
Descriptions, though, I feel like are something that a GM (or GMs) should be writing him- or herself. It's part of the responsibility of the position.