Definition of "Japonia"

In Japonia, 'tis a common thing to stifle their children if they be poor, or to make an abort, which Aristotle commends.

1621, Robert Burton, The Anatomy of Melancholy, I.2.4.VI

THE Tyrants of Japonia invented a ſtrange Torment for thoſe who confeſſed Chriſt

1702, Jeremy Taylor, Contemplations of the State of Man in this Life, And in That which is to come, 6th edition, page 193