2005 Oricon Top 40

#	Date	Single Artist	Single	Week Sales	Album Artist	Album	Week Sales
1	12.30	Every Little Thing	UNTITLED ~4 ballads~	110,315	Hamasaki Ayumi	RAINBOW	571,027
2	01.06	Nakajima Miyuki	Chijou no Hoshi / Headlight Taillight	40,604	CHEMISTRY	Second to None	1,075,872
3	01.13	175R	Happy Life	63,168	CHEMISTRY	Second to None	402,109
4	01.20	Shiina Ringo	Stem ~Daimyou Asobi Hen~	116,198	Hirai Ken	LIFE is...	351,258
5	01.27	Utada Hikaru	COLORS	437,903	BoA	VALENTI	615,218
6	02.03	Utada Hikaru	COLORS	139,829	BoA	VALENTI	222,851
7	02.10	RUI	Tsuki no Shizuku	114,040	EXILE	Styles Of Beyond	145,102
8	02.17	I WiSH	Asu e no Tobira	180,006	Shiina Ringo	Kalk Samen Kuri no Hana	165,316
9	02.24	I WiSH	Asu e no Tobira	111,676	Shiina Ringo	Kalk Samen Kuri no Hana	136,214
10	03.03	SMAP	Sekai ni Hitotsu Dake no Hana	630,399	t.A.T.u.	t.A.T.u.	64,503
11	03.10	SMAP	Sekai ni Hitotsu Dake no Hana	380,002	Hamasaki Ayumi	A BALLADS	561,127
12	03.17	SMAP	Sekai ni Hitotsu Dake no Hana	300,150	Yuzu	Sumire	256,327
13	03.24	B'z	IT'S SHOWTIME!!	308,262	Morning Musume	No.5	122,136
14	03.31	SMAP	Sekai ni Hitotsu Dake no Hana	99,592	Every Little Thing	Many Pieces	53,715
15	04.07	KinKi Kids	Eien no BLOODS	245,045	t.A.T.u.	t.A.T.u.	47,857
16	04.14	175R	Sora ni Utaeba	130,768	HY	Street Story	106,278
17	04.21	Morning Musume	AS FOR ONE DAY	84,251