What follows is some pretty cool fighting and some impressive physical stunts being played out along the lower section of Nathan Road in TST. Yes, this IS the same chase scene that just a few seconds ago saw him jumping over the wall of Man Mo Temple over on HK Island - movie world geography once again taking liberties with physical geography.
So, first Sanada climbs out of the window of the upper level (he's already had a fight on the lower one) and onto the roof.
Notice the planetarium dome in the background and the corner of the Peninsula Hotel just visible on the right of the screen. In 1982 the rest of the Cultural Centre and Museum of Art had yet to be built. He's then followed up there by his numerous attackers and a big fight ensues with no one falling off.
On this second shot we can see the Peninsula at the end of the road and immediately behind it (the next building along towards the camera) was most likely the former Peninsula Court hotel in its very last year of operation before being demolished to make way for the Kowloon Hotel. Somewhere closer to us behind that would be Prestige Tower and the building with the extended part jutting over the pavement looks to be Alpha House. That would make the MTR exit at the bottom right exit E.
At last we make it up to where the old Hyatt Hotel stood (formerly The President Hotel) and the rather well-known Emperor Watch and Jewellery sign that used to hang outside. The flags on the left side mark the Nathan Road entrance to the hotel - nowadays the hotel site is occupied by the iSore...sorry, I mean iSquare Mall. Sanada grabs onto the bottom of it to escape.
He then hangs on twenty feet above the road and waits for another passing bus before dropping on to its roof.