Fairly sure that is impossible. I believe there are laws in place that would prevent that.
At a minimum there is no way Japan would allow a sale like that.
- Deadliest mass shooting by an individual in US history (10/01/2017)
- Deadliest high school shooting in US history (02/14/2018)
- Deadliest massacre of Jews in US history (10/27/2018)
- Political assassination attempt of TWO former presidents(and 10+ other people) (10/23/2018 - and beyond)