As far as I recall, these are the G1 Transformers released in Hasbro markets that were not released in Japan. I haven't included toys that, while technically different characters, are identical as figures (e.g. Carb/Hosehead, Turtler/Snaptrap etc.). I've also not included Waverider, although his Pretender shell is blonde, whereas Diver's shell is a brunette; the core robots are identical. I'm also not including reissues. Japan never got the Classic Pretenders, but they did get the robots as "Hero Sets" (equivalent of Kmart Legends; only Grimlock and Starscream had cosmetic differences, Bumblebee and Jazz were the same.

Mini-Spies
Mini Spy Buggy
Mini Spy Porsche
Mini Spy F-1
Mini Spy 4WD

G1 Autobots
Bumblejumper
Gears
Ironhide
Topspin
Twin Twist
Jetfire
Omega Supreme
Roadbuster
Whirl
Powerdasher ("F-1 Dasher")
Powerdasher ("Drill Dasher")
Powerdasher ("Sky Dasher")
Sky Lynx
Hot Rod, Targetmaster
Kup, Targetmaster
Blurr, Targetmaster
Sky High (Pretender)
Splashdown
Groundbreaker
Gunrunner
Catilla
Chainclaw
Quickswitch
Optimus Prime, Powermaster
Quickmix
Scoop
Landfill
Dogfight
Override
Backstreet
Fizzle (almost the same as Wildspark; Fizzle has a red face, whereas Wildspark's is yellow)
Guzzle
Sizzle
Crossblades
Vroom
Skyhammer
Pincher
Longtooth
Doubleheader
Grimlock, Pretender (orange face)
Long Shot (variant colour)
Sunrunner (variant colour)
Flak (variant colour)
Sidetrack (variant colour)
Groundshaker
Retro
Surge
Pipeline
Gusher
Full-Barrel
Overflow
Jazz, Action Master
Rad
Jackpot
Blaster, Action Master
Bumblebee, Action Master
Mainframe
Skyfall
Snarl, Action Master
Kick-Off
Inferno, Action Master
Grimlock, Action Master
Rollout
Optimus Prime, Action Master
Prowl, Action Master
Over-Run
Wheeljack, Action Master
Sprocket
Sideswipe, Action Master
Tracks, Action Master
Powerflash
Omega Spreem
Windmill
Rumbler
Circuit
Rotorstorm
Rescue Force ("Leozak")
Rescue Force 1 ("Killbison")
Rescue Force 2 ("Jallguar")
Rescue Force 3 ("Drillhorn")
Gobots
Drench
Deftwing
Ironfist
Pyro

G1 Decepticons
Barrage
Chop Shop
Ransack
Venom
Runabout
Runamuck
Cyclonus, Targetmaster
Scourge, Targetmaster
Doubledealer
Darkwing
Dreadwind
Cindersaur
Sparkstalker
Quake
Needlenose
Spinister
Finback
Bugly
Iguanus
Carnivac
Snarler
Roadgrabber
Crankcase
Ruckus
Windsweeper
Thunderwing
Roadblock
Bludgeon
Stranglehold
Octopunch
Starscream, Pretender (black face)
Icepick
Bristleback
Birdbrain
Wildfly
Scowl
Slog
Blackjack
Hyperdrive
Detour
Roadhugger
Skyhopper
Cement-Head
Terror-Tread
Blackout
Spaceshot
Treadshot
Soundwave, Action Master
Devastator, Action Master
Shockwave, Action Master
Krok
Banzaitron
Starscream, Action Master
Axer
Gutcruncher
Megatron, Action Master
Bombshell, Action Master
Charger
Take-Off
Double Punch
Turbo Master
Thundercracker, Action Master
Slicer
Stalker
"Bonecrusher" (1992)
"Hook" (1992)
"Long Haul" (1992)
"Mixmaster" (1992)
"Scavenger" (1992)
"Scrapper" (1992)
Jetstorm
Deluge
Rage
Hydradread
Aquablast
Drench
Fearswoop
Calcar
Clench