Zosterops japonicus
It inhabits various places in Japan, from mountains to flatlands. However, there are few in Hokkaido.
It is characterized by the white pattern around its eyes and likes flower nectar.
Since there are not many of them in Hokkaido, I often go there to take pictures during the spring cherry blossom season and the plum blossom season.
It's very small and agile, so it's hard to shoot.