It's actually directly relevant in this context, because Japan does NOT in fact have vaccine passports today (as opposed to the 1870s as you allege). Furthermore, the reason is causally due to the behavior of Japanese authorities during World War II.

See eg https://items.ssrc.org/covid-19-and-the-social-sciences/covi...

> Unlike in Western countries, it is not possible to carry out lockdowns or forcibly isolate patients. Due to unchecked enforcement measures during World War II, there has been a tendency in Japan to strongly discourage the government from having strong coercive power, especially from interfering in ordinary people’s lives, so as not to repeat what happened during that period. The power of the Japanese government to intervene in individuals’ lives, even during an emergency, is constitutionally and legally limited. The Infectious Diseases Control Law, for example, was enacted with the utmost consideration for individuals’ human rights and it limits the public sector’s power to intervene in a person’s life, even for the purpose of infectious disease control. Besides, tracking infected people has many privacy considerations, and it is legally difficult in Japan to use GPS tracking or credit card histories to track activities, as it is being done in other Asian countries. The government’s ability to access individual citizens’ data is minimal, making infectious disease control difficult.