In the Japanese and North American versions, Raidou just has one new costume which is a color swap of the previous costumes.
In the PAL version however, Raidou gains two more new shinobi costumes.
Image
Description
Japan and North America
PAL
Red pants with suspenders, tabi-style boots, a glove and arm-guard on his left arm, a wristband on his right wrist, and protective gear over his left thigh.
n/a
Costume 1 - Default
Purple pants with suspenders, tabi-style boots, a glove and arm-guard on his left arm, a wristband on his right wrist, and protective gear over his left thigh.
n/a
Costume 2 - Default
Torn-up, beige dōgi with a skull on the collar, a teal sash, and bandages wrapped around his forearms.
(Originally his final boss costume from the arcade version of Dead or Alive.)
Costume 1 - Default
Costume 3 - Complete Tournament Mode
Torn-up, brown dōgi with a skull on the collar, a yellow sash, and bandages wrapped around his forearms.
Costume 2 - Default
Costume 4 - Complete Tournament Mode after unlocking costume 3
Torn-up, black dōgi with a skull on the collar, a red sash, and bandages wrapped around his forearms.
Costume 3 - Complete Tournament Mode
Costume 5 - Complete Tournament Mode after unlocking costume 4
In Dead or Alive++, all of the characters have 4 different costumes which are available from the start.
For Raidou, all of his costumes come from previous versions of the game.
Image
Description
Costume 1 - Red pants with suspenders, tabi-style boots, a glove and arm-guard on his left arm, a wristband on his right wrist, and protective gear over his left thigh.
Costume 2 - Purple pants with suspenders, tabi-style boots, a glove and arm-guard on his left arm, a wristband on his right wrist, and protective gear over his left thigh.
Costume 3 - Torn-up, black dōgi with a skull on the collar, a red sash, and bandages wrapped around his forearms.
Costume 4 - Torn-up, beige dōgi with a skull on the collar, a teal sash, and bandages wrapped around his forearms.
(Originally his final boss costume from the arcade version of Dead or Alive.)
Raidou is the only character in the Sega Saturn version not to have any unlockable costumes.
He also has the least amount with just 2 costumes.
Raidou has the least amount of unlockable and total costumes in the Japanese and North American PlayStation versions, with 1 unlockable and 3 in total.
Along with Zack, Hayabusa, and Jann Lee, Raidou also has the least amount of costumes in the PAL version, with each having 5 in total.