When Tokyo boomed in the '80s and early '90s, the city's nightlife surged along with it.

But even when the bubble burst and expense accounts shrank, after-hours spots continued to thrive. Today's Tokyo still offers a wide array of bars where the whiskeys are served neat and the cocktails are made by men in tuxedos who have devoted decades to the art of mixology.

From Haneda to Happy Hour Think Global, Drink Local Sydney's Hidden...