Very very cold today (a high of minus 10) and no birds of interest around near my apartment so here is another old pic.
Long-tailed Ducks are winter visitors to SW Hokkaido but not particularly common. I’ve only seen one so far this winter and it was way offshore. Around this time they do turn up in some of the local ports. Oshamanbe is the most reliable place to see them but the above drake was in Sawara a couple of years ago.