An all you can eat place, though not primarily all-you-can-eat-sushi but does have a small sushi selection, is
Aroma in the W12 Centre at Shepherd's Bush. It isn't fantastic, but as pan-Asian buffets go, it's alright. Closest tube is Shepherd's Bush on Central line / Overground.
Originally Posted by
13901
Anyway, since we're on the topic of Japanese foodstuff in West London, Tetote Factory is a great Japanese bakery in Ealing.
Well, if we are on the topic, then I'll put in a recommendation for
Tosa on King Street in Hammersmith (it's on the border between Hammersmith and Chiswick). It's primarily a yakitori place, but does sushi/sashimi and other main dishes as well that have always been decent when I tried them. Closest tube is Stamford Brook on the District.