HongKong Visa for Non Japanese resident from Japan?

Hi There,

This is Ang Phuri originally I,m from Nepal we are resident holder in Japan we would like to visit Hong Kong and Macau for a week long holiday. Therefore, we were wondering whether we have to apply HongKong & Macau here in China Embassy or we will get on arrival at airport? We appreciate it lot if you explain the option?

Thank you.