I've used Base many'a times. Pre-order'd Spiderman from there and also where I'm pre-ordering Red Dead 2
Ōkami for £12.99. Has traditional Japanese style rather than anime, but it's a classic game. Gal*Gun: Double Peace for £10.85. Shoot anime school girls with your love weapon, until they fall to their knees. Not a great game, but it's funny for a while!
Sold out! Dammit, I had it in my basket but by the time I got to the payment section it had gone. Which one of you buttheads got my copy? XD
Rabi Ribi is only £8.99 on the same site. It's a 2D Metroidvania / bullet hell game featuring Anime bunny girls. Doesn't get much more Japanese than that, really...