Just want to confirm for fellow New3DS Japanese System owners..
I finally succeed downgrading to 9.1. Here are the details if needed:
System : New 3DS
LL Pearl White
(JP System)
Firmware : 10.3- (latest)
Entrypoint used:
Menuhax2.1 (with config Hold R when booting to enter HBL)
000400102002CA00.cia deleted
No of tries: 6
Note: Before opening sysupdater, i always open FTBrony first, then press B twice to go back to HBL, then open sysupdater. (Advice from several forum members)
Often freeze on step 2, 7 , 8.. (If freeze happens on the steps, just hold power button to force shut down) then try again.
After that downgrade menu show up, press Y. Heavy Breathing~~
~~~~.cia installed
~~~~.cia installed
Success and automatically rebooted after 10 seconds.
Home menu displayed, check setting , 9.1x firmware spotted

HURRAHHH !!
Thanks for all the devs and you guys on gbatemp
