I went and counted all the titles in ANN that were not italicized (or what I thought were not) and came out to a figure of 5,836 different entries from counting between July 10/11th to July 18th 2011 night. The current listed numbers at ANN are:
5873 anime titles (+ 349 related)
- 2399 TV series, 2048 OAVs, 1102 movies, 249 TV specials, 48 ONAs, 27 omnibus
I doubled checked my addition and all the totals came out the same and every time I double checked my counting, the numbers came out the same. So either I didn't count it right or something happened so that I didn't count them right.
The ANN Encyclopedia letter totals that I came up with are as follows:
# - 28
A - 331
B - 310
C - 304
D - 404
E - 96
F - 150
G - 329
H - 311
I - 157
J - 67
K - 394
L - 178
M - 555
N - 186
O - 167
P - 252
Q - 9
R - 149
S - 685
T - 325
U - 98
V - 58
W - 105
X - 21
Y - 121
Z - 46
Apparently the ANN Encyclopedia has a much higher ratio of English titles than my estimate of romaji first letter percentage for A-D Japanese anime titles and that was one reason my percentage estimate for the lettering was so far out of whack. Man...there's just a heck of a lot of anime titles that begin with the letter S. That's always been a nightmare letter for me. It's always difficult finding anything within all those S's.
So right now let's go with the rough 6,000 figure as Iceman said.
Next, I'll try and see if I can get a general idea of how many adult anime there are. That shouldn't be too difficult...just click all the OAV listings and then include the Yosuga no Sora TV series as a footnote.
