Try all different Business Directories offered by Whitepages.hk
Every Engine has different results,
Most companies are listed in serveral directories
but the results are not the same ...
and order them directly (example Sony Cameras, Pokemon, Video Games)
Products via Amazon
Yellow Pages B2C
Business to Consumers - Companies froviding Products or Sevices for End Users
(example clothing store)
Yellow Pages B2B
Business to Business
Companies providing Products for Professionals
(example Manufacturer of Sewing machines)
search through the government
Hong Kong Gov Search
this search engine goes through
all the Japanese ministeries,
maybe the company you are looking for
has been mentioned.
Phone Book of the World.com
maybe the person you are looking for has moved
and can be cound through the directory of another country
good luck ...