"Alexa, ask visa requirements for British citizens to go to US"
"for Americans to go to Japan"
"Japanese citizen to go to UK"
Figuring out the visa requirements for making an international travel can be difficult and this skill can easily look them up for you. Just say your country of citizenship and which country you plan to visit, and the skill will tell you if you need a visa or not, along with any specific requirements.
DISCLAIMER: This skill is for informational purposes only. Always check with the embassy of your destination country for current visa requirements before travelling.