Incidentally, 'Kankan no' was a popular tune from the Edo period to the Meiji period, and 'Hokaibushi' was the tune that Freedom and People's Rights Movement's desperadoes and others in the Meiji period sang to accompany their gekkin.
ちなみに「かんかんのう」は江戸から明治にかけて流行した曲で、「法界節」は明治の自由民権の壮士たちが月琴を弾きながら唱った曲である。