Prostitution Hypocrisy
As Lauren’s page about Pan-pan girls indicates, the Japanese arranged girls to be sex workers serving the American soldiers during the occupation. So there never was a real intention to do away with sex work. That is not surprising when both camps were strongly patriarchal regimes. What the elimination of legal prostitution did was create a space of hypocrisy in which all the privileged and all men could be satisfied.
For a better look at Pan-pan girls:
Pan-pan Girls
Morrison, Andrew D. "Teen prostitution in Japan: regulation of telephone clubs." Vanderbilt Journal of Transnational Law, Mar. 1998, pp. 457-497. LegalTrac, go.galegroup.com/ps/i.do?p=LT&sw=w&u=unc_main&v=2.1&it=r&id=GALE%7CA20862669&sid=summon&asid=a5ec6d9b8db26bd13526e03c5ec98105. Accessed 30 Apr. 2017.