Hardware Japanese 3DS XL - Downgrade?

[CaesarMoonSama]

Hi, I have a japanese 3DS XL Blue - Black.
System is in 8.1 .
And the serial under the 3DS is SJH1132.

I would like to know if it's possible to downgrade it.
Thanks.

 

[omgcat]

wait oops, there should be a downgrade for 8.1 regular 3ds xl. here is more info : https://gbatemp.net/threads/gateway-downgrading.378195/