Here is the weekly manga sales ranking for December 14th - 20th.

*1, 132,593 *,132,593 Hajime no Ippo vol.90
*2, 128,057 *,128,057 Air Gear vol.27
*3, 121,307 *,121,307 K-ON! vol.3
*4, 112,761 *,112,761 Kekkaishi vol.27
*5, 102,641 1,865,059 One Piece vol.56
*6, *94,682 *,*94,682 GTO: Shonan 14 Days vol.2
*7, *81,779 *,*81,779 Major vol.74
*8, *78,812 *,984,076 Nodame Cantabile vol.23
*9, *77,397 *,*77,397 Kaiohki vol.42
10, *75,938 *,*75,938 History's Strongest Disciple Kenichi vol.36

11, *66,630 *,*66,630 Bloody Monday Season 2 vol.2
12, *62,525 *,*62,525 Capeta vol.21
13, *61,898 *,*61,898 Zettai Karen Children vol.19
14, *58,887 *,*58,887 Shitsuji-sama no Okiniiri vol.7
15, *55,266 *,126,056 Chihayafuru vol.7
16, *47,469 *,685,679 Bleach vol.42
17, *45,827 *,*45,827 Code:Breaker vol.8
18, *44,662 *,447,738 Katekyo Hitman Reborn! vol.27
19, *43,728 *,444,516 D.Gray-man vol.19
20, *42,549 *,*42,549 Usogui vol.14

21, *42,078 *,*42,076 One Piece Film Strong World Eiichiro Oda Artbook
22, *41,127 *,*41,127 Usogui vol.15
23, *32,816 *,*57,922 Papillon - Hana to Chou vol.8
24, *32,470 *,109,404 Souten no Ken vol.21
25, *31,605 *,*31,605 Kurogane no Linebarrel vol.14
26, *31,177 *,*31,177 Kingdom vol.16
27, *28,586 *,*28,586 Cage of Eden vol.5
28, *27,682 *,*27,682 Saijou no Meii vol.8
29, *26,836 *,*28,836 Monochrome Shounen Shoujo vol.2
30, *26,770 *,*26,770 Kinnikuman II Kyukyoku no Chojin Tag hen vol.20

Source: Oricon Manga Ranking
Japan's Weekly Manga Ranking for Dec 7 - 13

Weekly Light Novel Ranking for Dec 14 - 20
*1, 36,005 *36,005 Seitokai no Ichizon vol.7
*2, 27,474 *27,474 Uchi no 3 Shimai vol.11
*3, 20,701 *20,701 Theater!
*4, 18,291 *18,291 Yasuraka na Yoru no Tame no Guwa
*5, 14,545 *46,888 Guin Saga vol.130
*6, 10,308 *10,307 Toaru Hikoushi eno Renka vol.3
*7, *9,460 **9,460 High School DxD vol.5
*8, *9,302 147,911 Saiunkoku Monogatari vol.15
*9, *8,382 *50,148 Sword Art Online vol.3

Source: Oricon Novel Ranking