Not the easiest little longhorn to identify… I can’t decide whether it is Sciades fasciatus (here) or S. sakishimanus (here), let alone the subspecies. Whatever it is, it seems to be quite rare. Of course, I could be completely wrong and it might be another species altogether. I’m going to need to consult an expert.
longhorn beetle = kuroobi-togemune-kamikiri
Location: In sweet chestnut grove next to Munakata Common (Google map)