This species of sawfly (shimajiro kuro habachi) seems to be pretty common, jumping from leaf to leaf hunting for prey. It is easy to identify with the distinctive white tips to its antennae and a white/yellow spot on its thorax.

Macrophya apicalisMacrophya apicalis

Insecta: Hymenoptera: Symphyta (sawflies) = habachi
Macrophya apicalis = shimajiro kuro habachi