Visa to HK. I'm from Belarus, living in Japan. What documents are required?

You need to prepare copy of passport, a fully completed application form attached with a passport-style photo, proof of your financial support, transportation and accommodation arrangement and your travel itinerary. Next, submit the application to the embassy of China in Japan to apply for HK tourist visa. Or post the application to HK immigration department directly. Below is the postal address:
Receipt and Despatch Sub-unit
HK Immigration Department
2/F, Immigration Tower
7 Gloucester Road
Wan Chai, HK