Here is the Anime DVD sales rankings for May 25th - 31st.

**, 49,000 49,000 Rebuild of Evangelion: 1.0 YOU ARE (NOT) ALONE ver.1.11 Blu-ray
*1, 17,531 17,531 Mobile Suit Gundam 00 Second Season vol.4
*2, 14,844 14,844 Prince of Tennis: Another Story ~Kako to Mirai no Message~ vol.1
*3, 11,665 11,665 Gintama vol.10
*4, 10,827 10,827 The Melancholy of Haruhi-chan Suzumiya vol.1
*5, 10,359 10,359 Rebuild of Evangelion: 1.0 YOU ARE (NOT) ALONE ver.1.11
*6, *9,453 *9,453 Tengen Toppa Gurren Lagann: Kirameki Yoko Box ~Pieces of Sweet Stars~
*7, *9,362 *9,362 Toradora! vol.5 Limited Edition
*8, *9,230 *9,230 Kuroshitsuji vol.5 Limited Edition
*9, *9,049 *9,049 Zoku Natsume Yuujinchou vol.2
10, *8,611 *8,611 Kannagi vol.7
11, *6,305 22,248 Hetalia Axis Powers vol.2 Limited Edition
12, *5,463 *5,463 Junjo Romantica 2 vol.5 Limited Edition
13, *5,309 *5,309 Tales of the Abyss vol.4
14, *4,765 *4,765 To Aru Majutsu no Index vol.5 Limited Edition
15, *4,687 *4,687 Bleach Hamen vs. Shinigami Hen vol.1 Limited Edition
16, *4,161 *4,161 Ga-Rei -Zero- vol.6 Limited Edition
17, *4,124 *4,124 Chrome Shelled Regios vol.3 Limited Edition
18, *3,233 *3,233 Slayers Evolution-R vol.3
19, **,*** **,*** Katekyo Hitman Reborn! Mirai Hen X vol.2
20, **,*** **,*** Hetalia Axis Powers vol.1 Limited Edition

Sources:
Oricon Anime DVD ranking
Oricon YouTaiju Service
Mainichi

Ref. the full data of the last week's ranking
*1, 15,943 *15,943 Hetalia Axis Powers vol.2 Limited Edition
*2, *8,538 *19,012 Hetalia Axis Powers vol.1 Limited Edition
*3, *2,944 **2,944 Higurashi no Naku Koro ni Rei vol.3 Collectors Edition
*4, *2,713 **2,713 Maria†Holic vol.3
*5, *2,624 **2,624 Rosario + Vampire Capu2 vol.6
*6, *2,346 **2,346 Kurogane no Linebarrels vol.6 Limited Edition
*7, *2,242 **2,242 Akane-iro ni Somaru Saka vol.6 Limited Edition
*8, *2,216 **2,216 Maria-sama ga Miteru 4th vol.3 Collectors Edition
*9, *2,201 **2,201 Soul Eater vol.10
10, *1,729 **1,729 Zettai Karen Children vol.10
11, *1,159 **1,159 Asu no Yoichi! vol.3 Limited Edition
12, *1,070 **1,070 Maria-sama ga Miteru 4th vol.3 Normal Edition
13, **,987 *15,530 Isshoni Training
14, **,893 914,456 My Neighbor Totoro
15, **,882 ***,882 ChäoS;HEAd vol.3
16, **,877 ***,877 Yozakura Quartet vol.6
17, **,826 *26,213 Code Geass - Hangyaku no Lelouch R2 vol.9
18, **,811 ***,811 Tower of Druaga - the Sword of Uruk vol.3
19, **,773 ***,773 Macademi WAsshoi! vol.6
20, **,765 *51,024 La Maison en Petits Cubes