Here is the weekly manga sales ranking for May 17th - 23rd.

*1, 344,363 344,363 Detective Conan vol.68
*2, 296,707 296,707 Fairy Tail vol.21
*3, 179,353 179,353 Kekkaishi vol.29
*4, 164,509 165,334 Mahou Sensei Negima! vol.30
*5, 160,874 161,377 Ace of Diamond vol.21
*6, 141,902 141,902 GANTZ vol.28
*7, 124,047 124,047 Hetalia Axis Powers vol.3 Special Edition
*8, 120,395 120,395 Major vol.76
*9, 113,710 113,710 History's Strongest Disciple Kenichi vol.38
10, *97,212 *97,212 Peacemaker vol.5

11, *90,268 *90,268 Liar Game vol.12
12, *89,503 *90,116 Bloody Monday Season 2 vol.3
13, *81,914 *83,158 Capeta vol.22
14, *81,681 *82,486 Sayonara Zetsubou Sensei vol.21
15, *81,260 *81,260 Giant Killing vol.15
16, *78,230 *78,230 Shitsuji-sama no Okiniiri vol.8
17, *70,331 *70,331 Moteki vol.4
18, *64,406 *64,576 Yankee-kun to Megane-chan vol.17
19, *61,650 *61,650 Historie vol.6
20, *59,097 *59,097 Toaru Majutsu no Index vol.6

21, *56,205 *56,205 Gekkou Jourei vol.9
22, *55,846 *56,006 Code:Breaker vol.10
23, *54,416 *54,416 Love So Life vol.4
24, *54,272 *54,272 Jormungand vol.8
25, *54,042 *54,042 Hoshi wa Utau vol.8
26, *53,755 *53,755 Hetalia Axis Powers vol.3
27, *50,401 *50,712 Mudazumo Naki Kaikaku vol.4
28, *50,080 *50,080 Fairy Tail +
29, *49,515 *49,515 81 Diver vol.15
30, *49,293 *49,293 Adamas vol.4

Source: Oricon Manga Ranking

Weekly Light Novel Ranking for May 17 - 23
*1, 13,862 *13,862 Gantz/Minus
*2, 13,691 *13,691 Kore wa Zombie Desu ka? vol.5
*3, 13,225 *13,225 Itsuka Tenma no Kurousagi vol.6
*4, 12,978 161,403 Tenchi Meisatsu
*5, 10,099 *10,099 Shokan Kyoshi Real Bout Highschool vol.18
*6, *9,640 **9,640 Tokyo Elevens vol.1
*7, *9,542 **9,542 Sword Art Online 2.0 Replay vol.8
*8, *9,119 **9,119 Seiken no Blacksmith vol.9
*9, *8,869 **8,869 Kami-sama no Inai Nichiyobi vol.2
10, *8,537 *79,905 Ore no Imouto ga Konna ni Kawaii Wake ga Nai vol.6
11, *7,866 146,114 Katekyo Hitman Reborn! Hidden Bullet vol.4
12, *7,668 241,667 Durarara!! vol.1
13, *7,162 **7,162 Natsumi Shanon to Fushigi na Sekai vol.2

Source: Oricon Novel Ranking