There were
taxonomic changes in recent years. It wasn't the simplest mapping and many subspecies were shuffled around.
I think these are the expected species and subspecies:
Swinhoe's White-eye (previously part of Japanese White-eye):
Zosterops simplex simplex
Warbling White-eye (previously called Japanese White-eye):
Zosterops japonicus japonicus
Lowland White-eye:
Zosterops meyeni batanis
Here's my take. Someone with more experience/knowledge can correct me!:
- I believe it's Swinhoe's White-eye. It is by far the most common of the three so a good starting point for comparisons.
- Warbling White-eye is not common but there appear to be records by the coast in multiple areas. Your bird has brightish yellow/green above the beak and on the chin so Warbling White-eye is less likely - usually colouring is a duller more even tone.
- Lowland White-eye is not common - most (or all?) observations are in the southeastern islands (not in the north west mainland where this bird was). I believe it's not easy to distinguish between Swinhoe's and Lowland based on visuals alone but might be possible to distinguish based on vocals. I would feel comfortable ruling out Lowland based on location.