What is the genus and species of a Japanese cicada?

There are many species of cicadas in Japan, so it's impossible to give you a single genus and species without more information.

To identify a specific Japanese cicada, you would need to provide more details, such as:

* Where in Japan was the cicada found? Different species inhabit different regions.

* What does the cicada look like? Consider features like size, color, wing patterns, and any distinctive markings.

* When did you hear the cicada? Some species have distinct calling periods.

Once you have more information, you can consult resources like online guides, field guides, or experts in entomology to help you identify the species.