Here is the weekly manga sales ranking for September 20th - 26th.

*1, 570,979 570,979 Kimi ni Todoke vol.12
*2, 114,520 114,520 Thermae Romae vol.2
*3, *83,577 188,790 GANTZ vol.29
*4, *82,378 193,359 Hajime no Ippo vol.93
*5, *78,485 *78,485 Uchuu Kyoudai vol.11
*6, *64,020 139,394 Hanazakari no Kimi Tachi e After School
*7, *63,159 130,435 Major vol.77
*8, *59,177 130,564 Liar Game vol.13
*9, *57,153 *57,153 Kiyoku Yawaku vol.13
10, *55,389 *55,389 Koibana! Koiseyo Hanabi vol.9

11, *53,095 161,948 flat vol.4
12, *51,164 102,695 Otomen vol.11
13, *50,815 *50,815 Switch Girl!! vol.13
14, *49,628 117,771 Kaiouki vol.45
15, *48,411 105,356 Area no Kishi vol.22
16, *48,124 107,851 Rozen Maiden vol.4
17, *47,962 *47,962 Keroro Gunsou vol.21
18, *46,342 *70,174 Sora no Otoshimono vol.9
19, *42,005 206,441 Chihayafuru vol.10
20, *41,548 *41,548 Shinrei Tantei Yakumo vol.3

21, *36,679 *79,148 Yankee-kun to Megane-chan vol.19
22, *35,928 *38,439 The Super Dimensional Fortress Macross - The First vol.2
23, *33,638 *71,457 Kyoukai no RINNE vol.5
24, *33,300 *74,465 Usogui vol.18
25, *33,159 *33,159 FIVE vol.14
26, *32,887 *32,887 Seiken no Blacksmith vol.4
27, *32,654 *72,836 Hoshi wa Utau vol.9
28, *31,248 *31,248 Darker than BLACK - Shikkoku no Hana vol.3
29, *30,681 *72,510 Berry Berry vol.3
30, *30,377 *30,377 Yandere Kanojo vol.4

Source: Oricon Manga Ranking

Weekly Light Novel Ranking for Sep 20 - 26
*1, 20,952 *20,952 Shinrei Tantei Yakumo vol.6 Part 1
*2, 20,328 *20,328 Shinrei Tantei Yakumo vol.6 Part 2
*3, 11,748 *11,748 Papa no Iukoto wo Kikinasai! vol.4
*4, 11,067 *12,079 MM! vol.10
*5, 10,467 *11,363 Seikoku no Dragonar vol.2
*6, 10,397 *29,148 Uchi no 3 Shimai vol.3
*7, 10,301 253,254 Colorful
*8, *7,628 *13,736 Shin Densetsu no Yuusha no Densetsu Kakumei Hen vol.6

Source: Oricon Novel Ranking