Here is the weekly manga sales ranking for May 10th - 16th.

*1, 69,819 *,794,414 Nodame Cantabile vol.24
*2, 62,825 *,918,583 Naruto vol.51
*3, 49,184 *,*49,184 Q and A vol.2
*4, 41,068 *,*41,068 Kodomo no Jikan vol.8
*5, 39,981 *,*80,637 Drop vol.10
*6, 37,632 *,*37,632 Tonari no Atashi vol.4
*7, 37,086 1,184,337 Fullmetal Alchemist vol.25
*8, 36,384 *,466,351 Katekyo Hitman Reborn! vol.29
*9, 35,330 *,*35,587 Majo wa Nido Aegu vol.3
10, 33,917 *,*33,917 Good Morning Kiss vol.5

11, 33,390 *,393,272 Gintama vol.34
12, 32,245 *,278,009 New Prince of Tennis vol.3
13, 29,979 *,332,048 Bakuman vol.8
14, 25,907 *,*25,907 Tora to Ookami vol.1
15, 23,389 *,*63,378 Shinjuku Swan vol.22
16, 22,441 *,*22,849 Ren'ai Sousa vol.3
17, 22,019 *,450,557 Ookiku Furikabutte vol.14
18, 21,068 *,*21,068 Will you start Secret Love with me? vol.4
19, 19,492 *,184,113 Toriko vol.9
20, 19,021 *,*43,873 Crows Zero vol.8

21, 18,594 *,*68,281 Hyakki Yakosho vol.11
22, 18,311 *,329,207 Thermae Romae vol.1
23, 18,113 *,375,131 xxxHOLiC vol.17
24. 17,239 *,*17,239 Anata ni Hana wo Sasagemashou vol.1
25, 16,704 *,*16,704 Junai Tokkou Taichou vol.2
26, 16,311 *,*60,306 One Piece Log Book Omake The 12th Log
27, 15,512 *,166,768 Mayoi Neko Overrun! vol.1
28, 15,271 *,113,555 Jin vol.18
29, 15,021 *,*15,021 Tsugumomo vol.4
30, 14,200 *,*14,200 Shouri no Akuma vol.3

Source: Oricon Manga Ranking

Weekly Light Novel Ranking for May 10 - 16
*1, 39,170 *71,368 Ore no Imouto ga Konna ni Kawaii Wake ga Nai vol.6
*2, 16,799 148,425 Tenchi Meisatsu
*3, 12,400 138,248 Katekyo Hitman Reborn! Hidden Bullet vol.4
*4, *9,570 **9,570 Oda Nobuna no Yabo vol.3
*5, *9,214 *17,123 Kamisama no Memocho vol.5
*6, *9,067 *14,553 Dansho no Grimm vol.12 part 1
*7, *8,965 *18,805 Ore to Kanojo ga Maoh to Yusha de Seitokaicho
*8, *7,440 *13,032 Gunparade March vol.26
*9, *7,161 233,999 Durarara!! vol.1
10, *6,960 *12,692 Wizard's Brain vol.8
11, *6,619 **6,619 Invisible Risk vol.1
12, *6,589 166,871 Yojouhan Shinwa Taikei

Source: Oricon Novel Ranking