Pubic styling is not in the mainstream in Japan to the extent that it is in the west. Despite its infamous reputation as the home of lolicon, cosplay, tentacle porn and other perversions, Japan is still at heart a modest and conservative society. Mothers commonly bathe with their children, any domestic vacation is likely to revolve around visiting public hot springs, and families live in close quarters, so women are often reluctant to cause a stir with radical pubic hair trimming.
Perhaps that explains the fact that the most commonly seen pubic trim is the stealth style, aka the ‘top-knot’ or chon-mage. This style is not immediately obvious to the casual glance. While Japanese porn does feature plenty of shorter trims, and also plenty of ‘full monties’, those are not very often seen at the public bath house. And black hair against a pale skin makes the ‘white tiger’ a difficult style to carry off.
From left to right, natural styles from wispy to spiky, the top-knot, an oval top-knot, and the ‘white tiger’.