Cheers, John! The tweaks were simple.
Terrain:
Paddy Fields = Marsh.
Stockade = Linear Obstacle, 1 Cover vs Assault only.
Generals:
May choose to join a unit and fight personally in an Assault.
Add 1 Advantage to their unit.
After the Assault, roll 2D6.
If their unit won, General is killed on a roll of 12.
If their unit lost, General is killed on a roll of 10+.
Weapons:
Cannon – Firepower Factor 4 up to 3"; FF 3 up to 12".
Cannon goes Low Ammo every time it fires (i.e., must reload)
Arquebus – Range 6". Firepower Factor 1 per base.
Bow – Range 9". Firepower Factor 1 per base.
Bows 1 Left shift when firing at Samurai (because of their armour).
Typical Troop Types:
Samurai Cavalry A K Vet
Samurai A K Vet
Samurai A Vet
Ronin A Vet
Ronin A Trnd
(Samurai and Ronin may or may not have Bow)
Ashigaru Trnd
(Ashigaru may or may not have Arquebus or Bow)
A = Aggressive
K = Shock (an additional +1 in Assault)
I hope this helps you get your samurai on the table.
Merry Christmas!
Chris