Biggest chart position falls
#1 2011/05/23 #1→#111 Shojohikou／Passpo☆
#2 2010/07/05 #1→#31 -Haruka-／TOKIO
#2 2008/02/04 #1→#31 Purple Line／Tohoshinki
#4 2009/05/25 #1→#28 Shalala/Mugen no Hane／Takizawa Hideaki
#5 2009/06/01 #1→#27 Shouganai Yume Oi Hito／Morning Musume。
#6 2010/12/13 #1→#26 Ai wa Takaramono／Tackey & Tsubasa
#6 2006/01/30 #1→#26 feel（Completely Limited Edition Single）／Koda Kumi
#8 2008/11/03 #1→#25 -MIROTIC-／Tohoshinki
#9 2010/04/05 #1→#24 Akkanbe-Hashi／Watarirouka Hashiritai
#10 2003/11/17 #1→#21 Long Road／w-inds.
#11 2010/05/24 #1→#20 Aitai Riyuu/Dream After Dream ～Yume kara Sameta Yume～／AAA
#12 2008/01/28 #1→#19 MIRAGE／AAA
#13 2008/08/04 #1→#18 Doushite Kimi wo Suki ni Natte Shimattandarou?／Tohoshinki
#13 2006/07/17 #1→#18 The Rainbow Star／ENDLICHERI☆ENDLICHERI
#15 2006/03/13 #1→#15 SEASON'S CALL／HYDE
#15 1999/12/27 #1→#15 kanariya（Limited to 300,000 copies)／Hamasaki Ayumi
#15 1989/12/18 #1→#15 Film no Mukougawa／Minamino Yoko
Biggest percentage drops
98.6%↓ *42,706 ***,581 Passpo☆ 「Shojohikou」
97.0%↓ *20,330 ***,615 SS501 「LUCKY DAYS」
95.5%↓ *14,736 ***,656 Mano Erina 「Haru no Kaze」
95.4%↓ 112,771 **5,169 Tohoshinki 「SUMMER ～Summer Dream/Song for you/Love in the Ice～ 」
95.2%↓ *13,339 ***,643 Mano Erina 「Onegai da kara…」
95.1%↓ *22,537 **1,107 Momoiro Clover「Ikuze! Kaitou Shojo」
95.1%↓ *20,375 **1,004 SUPER JUNIOR 「U/TWINS」
95.1%↓ *20,012 ***,982 John-Hoon 「Kimi wo Mamoritai」
source: mac and cheese @ J-Pop Central
wow, Passpo... that's embarrassing. Tohoshinky has 3 (the most) singles on here, wow! smh! and lol at the percentage drop category being dominated by SS501, Tohoshinki, SuJu and John-Hoon.
