Japanese Pygmy Woodpecker at Onuma. This is the race found in Hokkaido (ijimae) which is paler than birds further south and west. The male has a red spot on its hindcrown which this female bird lacks.
This is the joint commonest of the 5 local Woodpecker species, the Great Spotted is also very common and widespread. They aren't shy and allow a close approach but seem to spend most of the time higher up in the trees meaning somewhat limited photo opps.