Hello Matsubara san,
They caught these frogs at my wife's mother home, Kurume, south of Fukuoka, inland of Kyushu island.
I also live in urban area, these creatures attract me, and my old days flash across my mind.
BTW, my wife wonders why you chose your callsign "Matsubara", this name is not so popular Japanese name like Tanaka, Sato, either not famous pilots name as I know.
If you don't care, would you tell us its reason?
KU_jijii