Is Akira the only anime produced in 24fps? I read an article recently that states:


  "Akira" rewrote every rule for animation. It was filmed at 24 frames per second, in full Cinemascope aspect, using 312 colors in the palette (the richest palette for any hand-done animation ever).


Based on this article, it seems Akira was the first anime (or perhaps animation) to be filmed at 24fps. Is it the only anime to do so, or did others do this later on as well?
From what I can tell (according to this):


  Practically all hand-drawn animation is designed to be played at 24 FPS. Actually hand-drawing 24 unique frames per second ("1's") is costly. Even in big budget films usually hand-draw animation shooting on "2's" (one hand-drawn frame is shown twice, so only 12 unique frames per second)[6] and some animation is even drawn on "4's" (one hand-drawn frame is shown four times, so only six unique frames per second).


Other sources (of varying degrees of reliability) say:


  Japanimation runs at an average of 24 frames per second, with main objects animated at 8 to 12 fps and background objects as low as 6 to 8 fps. 


(Source)


  Decent/high quality animation in general is done at the 24 frames/second rate (this also includes animation in other mediums, such as claymation and CG'd work). Now, depending on the 'look' and 'feel' they are aiming for--all of those 24 frames may be slightly different (in succession) than each other, to give 'movement' to the object on the screen (as in, none of the frames look exactly alike. There are slight variations between all frames), or only 12 of them may be different from each other--every other frame (in succession with each other) being varied, with an exact copy of the last frame before it acting as the ‘filler’ frame. So it's like 12 pairs of different frames--the first frame in each set varied from the last and its copy behind it to lengthen the time the image is on the screen.


(Source)

A general consensus, from the little that I can find, is that most anime now seem to have a frame rate of 24, but they often are 2s, which means that every frame is doubled so there are 12 unique frames per second. For example, a torrent site for Claymore lists the frame rate as 23.9, which is really 24 fps. So to conclude, Akira is not the only anime to be produced at 24fps.