Oricon Rankings e dati di vendita

One Piece #61 (2,086,080/2,086,080)
Gintama #38 (203,471/203,471)
Kaichou wa Maid-sama! #12 (99,416/99,416)
Sket Dance #17 (86,689/86,689)
Jin #20 (70,341/70,341)
Shiki #10 (53,376/53,376)
Tobaku Datenroku Kaiji: Kazuya Arc #5 (48,983/48,983)
One Piece Soushuuhen The 15th Log (48,326 /48,326)
Kochira Katsushika-ku Kamearikouen-mae Hashutsujo #173 (46,453/46,453)
Psyren #15 (42,691/42,691)

Clover #24 (39,281/135,933)
One Piece #60 (36,161/2,839,978)
Shinjuku Swan #25 (35,747/35,747)
Gantz #30 (32,121/261,676)
Toradora! #4 (30,810/89,593)
Kenka Shōbai #24 (30,583/30,583)
Giant Killing #18 (28,536/238,320)
Ai Da no Ai Da no #2 (27,689/27,689)
Shingeki no Kyojin #1 (27,385/629,461)
Shingeki no Kyojin #2 (26,621/607,479)

Shingeki no Kyojin #3 (26,162/561,046)
Nabari no Ou #14 (23,450/69,598)
One Piece #59 (23,344/2,802,280)
Naruto #54 (23,146/1,074,472)
Gantz #1 (22,206/114,172)
Sengoku Basara 3 -Roar of Dragon- #3 (20,565/20,565)
07-Ghost #11 (20,315/75,818)
Shrine of the Morning Mist #7 (19,745/20,026)
Gantz #2 (19,554/93,473)
Last Inning #28 (19,353/37,129)

chiedo venia per la mia ignoranza ma in che consiste questa classifica?

Sono i dati riferiti alle vendite dei tankobon (i volumi), dei vari manga in Giappone.

accidenti poi di quanto sia primo OP!
c'è un distacco ENORME tra il primo e il secondo!

One Piece #61 (485,623/2,571,703)
Gintama #38 (122,237/325,708)
Kaichou wa Maid-sama! #12 (71,274/170,690)
7SEEDS #19 (61,765/61,765)
Sket Dance #17 (58,249/144,938)
Jin #20 (56,582/126,923)
Kin Kyori Renai #9 (46,488/46,488)
Mitsudomoe #11 (45,896/45,896)
Shiki #10 (35,682/89,058)
One Piece #60 (33,372/2,873,350)

The Five Star Stories Reboot #11 (31,471/31,471)
Shinjuku Swan #25 (30,235/65,982)
Hyakko #6 (29,342/29,342)
Swan: Moscow Arc #1 (29,005/29,005)
Neko Mix Genkitan Toraji #4 (27,630/27,630)
Gakuen Prince #11 (27,328/27,328)
Tobaku Datenroku Kaiji: Kazuya Arc #5 (27,168/76,151)
Psyren #15 (26,952/69,643)
Saint Seiya: The Lost Canvas - Meiou Shinwa #23 (25,188/25,188)
Kochira Katsushika-ku Kamearikouen-mae Hashutsujo #173 (24,484/ 70,937)

Kenka Shoubai #24 (24,331/54,914)
One Piece #1 (24,057/797,989)
One Piece #59 (22,638/2,824,918)
One Piece #2 (21,436/747,910)
One Piece #3 (19,896/722,369)
Clover #24 (19,052/154,985)
Kiss and Never Cry #10 (18,512/18,512)
Yumekui Merry #6 (18,242/18,242)
One Piece #4 (18,082/690,336)
One Piece #5 (17,802/682,579)

Fairy Tail #25 (275,593) (Shonen Magazine)
Detective Conan #71 (262,116) (Shonen Sunday)
Ahiru no Sora #30 (184,587) (Shonen Magazine)
One Piece #61 (152,538/2,724,241) (Shonen Jump)
Mahou Sensei Negima! #33 (129,019) (Shonen Magazine)
Skip Beat! #27 (126,442) (Hana to Yume)
Kekkaishi #33 (114,542) (Shonen Sunday)
GTO: Shonan 14 Days #6 (101,288) (Shonen Magazine)
Hayate no Gotoku! #27 (73,240) (Shonen Sunday)
Area no Kishi #24 (71,312) (Shonen Magazine)

Dear Boys Act 3 #6 (67,972) (Bessatsu Shounen Magazine)
Hayate no Gotoku! #27 School Calendar-Bundled Limited Edition (64,078) (Shonen Sunday)
Kingdom #21 (53,119) (Young Jump)
Sayonara Zetsubō Sensei #24 (49,160) (Shonen Magazine)
Otomen #12 (41,382) (Bessatsu Hana to Yume)
Pumpkin Scissors #14 (40,133) (Magazine Great)
Eden no Ori #11 (38,880) (Shonen Magazine)
Zettai Karen Children #25 (37,161) (Shonen Sunday)
Gintama #38 (36,773/362,481) (Shonen Jump)
7SEEDS #19 (33,308/95,073) (Flowers)

Q.E.D. #38 (32,687) (Magazine Great)
Kin Kyori Renai #9 (29,861/76,349) (Bessatsu Friend)
One Piece #60 (27,372/2,900,722) (Shonen Jump)
Monochrome Factor #10 (25,408) (Comic Avarus)
C.M.B. Shinra Hakubutsukan no Jiken Mokuroku #16 (24,540) (Bessatsu Shonen Magazine)
Issho ni Neyō yo #4 (24,192) (Hana to Yume)
Shinyaku [Kyojin no Hoshi] Hanagata #22 (23,963) (Shonen Magazine)
Zettai Karen Children #25 School Calendar-Bundled Limited Edition (23,759) (Shonen Sunday)
Kaichou wa Maid-sama! #12 (23,579/194,269) (LaLa)
Crash! #9 (23,415) (Ribon)