Best JPN hucards to never see US release

[Turbo D]

I'd say to grab all the jdm only sega releases.

[runinruder]

I think America did pretty well with bringing HuCards out here. There are some Japanese only ones that are great and worth getting, but for the most part USA got a good number of games.

Yeah, I totally agree.  We got plenty of good HuCards over here: the Bonks, the Axes, Blazing Lazers, Splatterhouse, Dungeon Explorer, Ninja Spirit, Military Madness, Air Zonk, Soldier Blade, and so on.  There were some good ones that we missed out on, but very few of those would've gotten much attention over here (Parodius and SFII and maybe a couple others), and even those probably wouldn't have been "difference makers" in the overall picture. 

[Turbo D]

I agree. We mainly got screwed on supercds 

[Sinistron]

From my collection- I'd have to chime in with 1943, Atomic Robo-Kid, Battle Lode Runner, Bomberman '94, Bonze Adventure, Bikkuriman World, Coryoon, Don Doko Don (hated it at first- now I love it!), Doraemon Arabian Nights, Dracula Boy, Final Soldier, Genji Tsushin Agedama, Gomola Speed, Image Fight, Lady Sword, Legend of Valkyrie, Liquid Kid, Lost Sun-Heart, Parodius, Photograph Boy, Ryukyu, Salamander, SonSon II, TwinBee and W-Ring.  

But most especially Image Fight, Photograph Boy and SonSon II.