Here is the weekly manga sales ranking top 30 for March 16th - 22nd.

*1, 439,353 1,055,131 NANA vol.21
*2, 252,546 *,252,546 Fairy Tail vol.14
*3, 226,070 *,226,070 Ahiru no Sora vol.23
*4, 211,136 *,211,136 Tsubasa RESERVoir CHRoNiCLE vol.26
*5, 203,108 *,203,108 Air Gear vol.24
*6, 202,012 *,202,012 Hajime no Ippo vol.87
*7, 164,891 *,164,891 Bloody Monday vol.10
*8, 119,116 *,119,116 Zettai Karen Children vol.16
*9, 113,007 1,589,034 One Piece vol.53
10, 111,730 *,111,730 Kaioki vol.39

11, 106,589 *,106,589 Gakuen Alice vol.18
12, 100,164 *,100,164 Otomen vol.7
13, *91,459 *,*91,459 Soul Eater vol.14
14, *82,215 *,240,517 Cross Game vol.14
15, *78,971 *,*78,971 Boku o Tsutsumu Tsuki no Hikari Jisedai-hen vol.7
16, *69,485 *,*69,485 Usogui vol.11
17, *64,593 *,*64,593 Special A vol.16
18, *60,718 *,*60,718 Godhand Teru vol.45
19, *57,683 *,*57,683 Hanagata vol.13
20, *56,518 *,*56,518 Kingdom vol.13

21, *54,074 *,*54,074 Shibatora vol.11
22, *53,728 *,*53,728 Kurogane no Linebarrel vol.12
23, *53,422 *,*53,422 Ultimate Muscle vol.17
24, *53,272 *,*53,272 Sakyo! Toritsu Aoizaka Koukou Yakyuubu vol.19
25, *50,327 *,*50,327 Gekkou Jourei vol.4
26, *50,188 *,*50,188 Do Da Dancin' vol.5
27, *49,923 *,*91,048 Sakura-Hime Kaden vol.1
28, *47,686 *,204,011 Angel Heart vol.29
29. *45,190 *,*45,190 Shigurui vol.12
30, *42,782 *,*42,782 Arata Kangatari vol.2

Last week's ranking: Japan's Weekly Manga Ranking For Mar 9 - 15
Source: Oricon Comic Ranking

Additional news:
A Nintendo Wii game of "81 Diver" was released on March 25th. At the promotional event, the author Shibata Yokusaru won a Shogi match against a professional. It's extremely rare that an amateur Shogi player beats a professional. The opponent Fujita Aya made a record of the youngest professional female Shogi player (11 years and 6 month old).

Source: Famitsu

"Chihayafuru" won Manga Award 2009. Manga Award is chosen by bookstore keepers and no manga authors and editors are involved in the judging process. Chihayafuru is a shoujo manga about a Japanese classic card game "Karuta". Ayase Chihaya is a high school girl, who has an excellent ability in hearing. She aims at becoming the national champion of Karuta.

Source: Kodansha

Weekly Light Novel Ranking For Mar 16 - 22
*1, 63,799 *63,799 Chrome Shelled Regios vol.12
*2, 20,975 *58,670 The MANZAI vol.5
*3, 17,322 *17,322 Itsuka Tenma no Kurousagi vol.3
*4, 16,063 *16,063 Chrome Shelled Regios World Guide All of Regios vol.1
*5, 13,903 114,519 To Aru Majutsu no Index vol.17
*6, 13,715 121,800 Toradora! vol.10
*7, 10,581 *31,294 Kaki Gentei Kuri Kinton Jiken vol.2

Source: REV's Note