The highest-selling singles in Japan are ranked in the weekly Oricon Singles Chart, which is published by Oricon Style magazine. The data are compiled by Oricon based on each singles' weekly physical sales. This list includes the singles that reached the number one place on that chart in 2005.
Chart history Issue dateSongArtist(s)Ref.January 3"Anniversary"KinKi KidsJanuary 17January 24"Killing Me"L'Arc-en-CielJanuary 31"Tomodachi e (Say What You Will)"SMAPFebruary 7"Fantastipo"Toraji HaijiFebruary 14February 21"Hatsukoi Ressha"Kiyoshi HikawaFebruary 28"Sakura"KetsumeishiMarch 7"Asterisk"Orange RangeMarch 14March 21"Ai no Bakudan"B'zMarch 28"Cherish"NEWSApril 4"Sakura Sake"ArashiApril 11"Do the Motion"BoAApril 18"New World"L'Arc-en-CielApril 25"Bokutachi no Yukue"Hitomi TakahashiMay 2"Step You/Is This Love?"Ayumi HamasakiMay 9May 16"Kamen/Mirai Kōkai"Tackey & TsubasaMay 23"Smily/Biidama"Ai OtsukaMay 30"Jojoushi"L'Arc-en-CielJune 6"Love Parade"Orange RangeJune 13June 20"Onegai! Señorita"June 27"Veludo no Yami"KinKi KidsJuly 4"Utao-Utao"V6July 11"Yonjigen: Four Dimensions"Mr. ChildrenJuly 18July 25"Teppen"NEWSAugust 8"Bang! Bang! Vacance"SMAPAugust 15"Fairyland"Ayumi HamasakiAugust 22"Ocean"B'zAugust 29"Vestige"T.M.RevolutionSeptember 5Kizuna"Orange RangeSeptember 12"Glamorous Sky"Mika NakashimaSeptember 19August 29"Heaven"Ayumi HamasakiOctober 3"Planetarium"Ai OtsukaOctober 10"Be My Last"Hikaru UtadaOctober 17"Countdown"HydeOctober 24"Orange"V6October 31"Suki Sugite Baka Mitai"Def.DivaNovember 7"Pop Star"Ken HiraiNovember 14"Seishun Amigo"Shūji to AkiraNovember 21November 28"Wish"ArashiDecember 5"Triangle"SMAPDecember 12"Bold & Delicious/Pride"Ayumi HamasakiDecember 19"You"Kumi KodaDecember 26"Tada...Aitakute"Exile
References