My suggestion is, fixed on the model that you want to buy. 1 or 2 days before you depart, check the price here again. I bought my Nikon F90S in Japan, and is MIJ. The only negative part is, you will have to check the charger whether are they universal input, ie: in voltage from 100 - 220v. I am sure certain models will have worldwide warranty. Otherwise, you might need to think about it as I have few incidents where the DC need to send in for repair (various brand) within 1 year after purchase.
I have not been to Japan for 10 over years, so, I am not sure of the price over there now. But I think their accessories are sure to be much more attractive than Singapore.
Good luck.