>>98441255Anon if you ever find yourself in a situation like this where you can't tell if it's "weird" to do something or not, try putting yourself in the other person/people's shoes.
How would you feel if a decent looking guy came to you asking you to send a letter to a business in Japan? You'd probably feel nothing, because it's a non-issue.
At worst you'd think they were applying to a Japanese company to work in Japan and move on.