I saw the email from HR dept from SATOVAC inc and it says they are looking for people to work from home in USA and Canada. The email is showing the address of the sender as hr@satovac.co.jp. When you reply to the email, the email does not go to hr@satovac.co.jp but to reinayoshida@outlook.jp.

The email protocol (SMTP) has no authentication by default, so the spammer can pretend to originate a message apparently from any email address. To prevent this, some ISPs and domains require the use of SMTP-AUTH, allowing positive identification of the specific account from which an email originates.

I tried to reply to see what they have to offer and what they ask for to make money by cheating but then I changed my mind becasue fo the fear of misdirected bounces (i.e. e-mail spam backscatter).

Emails are not a word of God; and there are many more thieves than you can imagine. Thugs come in all shapes and colors now a days.