http://store.steampowered.com/tag/en/Japanese/
That's a more extensive list of "Japanese" tagged games on the steam store.
Of the games you listed, I would recommend Ikaruga and maybe Fairy Bloom Freesia, Gundemonium Collection, and the Exceed series.
Fairy Bloom is a nice little platformer...
Dunno how many of you are PC gamers, but Killer is Dead is releasing on Steam May 23:
http://store.steampowered.com/app/261110
The cheapest you can get it atm is from Gamefly for 14.xx after using the coupon code MAY20OFF.
Time to sell my unopened First Print copy -_-;
Also One Piece...
Thanks OP, went for the WiiU version. Too bad no PS3 version, but who can complain for FREE.
Also, can't checkout with Paypal, an error will popup. But checking out with Credit Card is fine.
It's YMMV. I've called the BestBuy number twice. First time they did refund the difference and still had GCU applied. The second time they refunded only the sale price without the GCU (a couple cents). Maybe you might have better luck trying to price match using the email support.
Best Buy comes through yet again!
https://www.youtube.com/watch?v=P3ALwKeSEYs
Also my Demon Gaze shipped from BB on the 17th, expected on Thursday. If it's like what I expected with my other games, it'll be handed to USPS which would delay it even further.