I bought this Japanese newspaper on eBay a couple of years ago. I can't read any Japanese, but the seller included this description:
The main headline is:
"Ceremonial entry into Hong Kong by Imperial Japanese Army and Navy "
Some articles and pictures:
- Japan flag stands at the Victoria Park, Hong Kong
- Commander Sakai and Japan troops parade through Hong Kong
- Celebration for occuping Hong Kong held
- Occupation of all islands of…
Update, 10 Jan 2019: The clips listed below are no longer online, but Moddsey has found another, similar set:
May not be in the same sequence as listed but the contents are similar as seen here: https://www.criticalpast.com/stock-footage-video/1941+hong+kong
The following newsreel clips aren't dated, but they'd likely have reached Japan soon after the British surrendered.