The highest-selling singles in Japan are ranked in the Oricon Weekly Chart, which is published by Oricon Style magazine. The data are compiled by Oricon based on each singles' weekly physical sales. In 2009, 51 singles reached the peak of the chart.
Sisters Kumi Koda and Misono's "It's All Love!" made them the fourth group of siblings to have a number one on the charts. However, they are the first siblings to have a number one debut on the charts in its initial week. Enka singer Junko Akimoto's makes her the oldest singer at the age of 61 years to have a number one single. The record was previously held by Kazumasa Oda's which was released in 2007. Korean pop boy band TVXQ's "Share the World/We Are!" debut at number-one on the charts, making them first foreign artist to have six number one singles in Japan.
Rock boy band KAT-TUN's "Rescue" makes them the third group to ten consecutive number one singles since their debut. KinKi Kids' extended their record for having the most consecutive number one singles since their debut. They also extended their Oricon record for having a number one single for 13 consecutive years since their debut. Pop singer Ayumi Hamasaki's "Rule/Sparkle" makes her the only solo female artist and the first female artist to have 20 consecutive singles to debut at number one. R&B singer Namie Amuro's Wild/Dr. debuted atop of the charts and made her the only female artist to have a top ten single each year for 15 years. is Aiko's first number one single in her 11-year career.
Pop boy band NEWS' makes them the second group to have 11 consecutive number one singles since their debut. Pop boy band Arashi's "Believe/Kumorinochi, Kaisei" and "Ashita no Kioku/Crazy Moon (Kimi wa Muteki)" are the first singles in seven years to sell over 500,000 copies consecutively with first week sales. This feat was last achieved by Keisuke Kuwata in 2001.
Chart history Issue DateSinglesArtist(s)Reference(s)January 12"Stay with Me"Kumi KodaJanuary 19Hideaki TakizawaJanuary 26Junko AkimotoFebruary 2"Bolero/Kiss the Baby Sky/Wasurenaide"TVXQ February 9KinKi KidsFebruary 16Kiyoshi HikawaFebruary 23"One Drop"KAT-TUNMarch 2AikoMarch 9"Rule/Sparkle"Ayumi HamasakiMarch 16"Believe/Kumorinochi, Kaisei"ArashiMarch 23"Rescue"KAT-TUNMarch 30"Wild/Dr."Namie AmuroApril 6"One Room Disco"PerfumeApril 13"It's All Love!"Kumi Koda x MisonoApril 20TsuyoshiApril 27"The Monster: Someday"ExileMay 4"Share the World/We Are!"TVXQMay 11NEWSMay 18Hideaki TakizawaMay 25"Shōganai Yume Oibito"Morning MusumeJune 1"Keshin"Masaharu FukuyamaJune 8"Ashita no Kioku/Crazy Moon (Kimi wa Muteki)"ArashiJune 15"Again"YuiJune 22"Infinity"Girl Next DoorJune 29V6July 6YusukeJuly 13"Everything"ArashiJuly 20TegomassJuly 27Yuma Nakayama w/B.I.Shadow, NYC BoysAugust 3"The Hurricane (Fireworks)"ExileAugust 10Koichi DomotoAugust 17"Ichibu to Zenbu/Dive"B'zAugust 24 "Sunrise/Sunset (Love Is All)"Ayumi HamasakiAugust 31Kiyoshi HikawaSeptember 7SMAPSeptember 14"Guilty"V6September 21"Rain"Tsuyoshi DomotoSeptember 28"Alive/Physical Thing"Kumi KodaOctober 5Hideaki TakizawaOctober 12"Colors (Melody and Harmony)/Shelter"Jejung & Yuchun (from TVXQ) October 19"It's All Too Much/Never Say Die"Yui October 26"My Lonely Town"B'z November 2"River"AKB48November 9KinKi KidsNovember 16"Kyū Jō Show!!"Kanjani EightNovember 23"My Girl"ArashiNovember 30"Loveless"Tomohisa YamashitaDecember 7"Bandage"LandsDecember 14"Nōdōteki Sanpunkan"Tokyo IncidentsDecember 21Keisuke KuwataDecember 28"Hatsukoi"Masaharu Fukuyama
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