In a lot of places, the exchange rate for buying their currency with USD, is significantly better than buying with any other currency. Relative to the "inter-bank exchange rate" you see on Google Finance and such, it seems they offer a better deal if you buy in USD.
Does the same apply in HK ?
Specifically I'm considering either buying HKD with JPY or USD. I'm also wondering if rates are usually better in HK or in Japan.
Edit: I don't have enough points to reply to the comment on my own question, so I'll answer here. I already have USD cash. The question is whether the RATE is better relative to the inter-bank rate, for USD rather than other countries. Buying USD never factors into this question.