Why did the shogunate dictate such strict policies towards Japanese traveling abroad

Sakoku (鎖国, "closed country") was the isolationist foreign policy of the Japanese Tokugawa shogunate (aka Bakufu) under which, for a period of 214 years, relations and trade between Japan and other countries were severely limited, nearly all foreign nationals were barred from entering Japan and common Japanese people

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regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.