I’m not sure if “warty leaf beetle” is the real common name for this kind of beetle, but it seems to be apt. The one I found was so tiny (3mm) and just looked like a seed or something stuck to the leaf. Then it flew to another leaf, giving the game away, and instantly attracting my attention. I’m quite pleased with the side view – what a weird little creature!
I’ve just realized that, if I’m right, the Japanese name (mushikuso-hamushi) means “insect poo leaf beetle” – trust the Japanese to come up with the best name!!!
warty leaf beetle = mushikuso-hamushi (lit. “insect poo” leaf beetle)
Location: In orchards and bamboo/pine forest above Yokoyama Village (Google map)