- References
{{unreferenced|date=March 2011}}This is a list of number one singles on the Billboard Japan Hot 100 chart in 2009. | Date | Song | Artist |
|---|
| January 5 | Stay with Me | Kumi Koda | | January 19 | Yume no Tsubomi | Remioromen | | January 26 | Velonica | Aqua Timez | | February 2 | Free | Mao Abe | | February 9 | Yakusoku | KinKi Kids | | February 16 | Wao! | Unicorn | | February 23 | One Drop | KAT-TUN | | March 2 | Milk | Aiko | | March 9 | Rule | Ayumi Hamasaki | | March 16 | Believe | Arashi | | March 23 | Rescue | KAT-TUN | | March 30 | Wild | Namie Amuro | | April 6 | One Room Disco | Perfume | | April 13 | It's All Love! | Kumi Koda & Misono | | April 20 | Niji | Kobukuro | | April 27 | Someday | Exile | | May 4 | Aitai | Yuzu | | May 11 | Koi no Abo | NEWS | | May 18 | Ashita ga Kuru Nara | Juju & Jay'ed | | May 25 | Love Forever | Miliyah Kato & Shota Shimizu | | June 1 | Keshin | Masaharu Fukuyama | | June 8 | Ashita no Kioku | Arashi | | June 15 | Again | Yui | | June 22 | Haruka | Greeeen | | June 29 | Spirit | V6 | | July 6 | Tanpopo | Yusuke | | July 13 | Everything | Arashi | | July 20 | Tanabata Matsuri | Tegomass | | July 27 | Stay | Kobukuro | | August 3 | Fireworks | Exile | | August 10 | Ayakashi | Koichi Domoto | | August 17 | Ichibu to Zenbu | B'z | | August 24 | | August 31 | Yume o Arigatō | Yuko Hara | | September 7 | Sotto Kyutto | SMAP | | September 14 | Niji | Yuzu | | September 21 | Sono Sake e | Dreams Come True & Fuzzy Control | | September 28 | Blame It On The Girls | Mika | | October 5 | Yell | Ikimono-gakari | | October 12 | Colors (Melody and Harmony) | Jejung & Yuchun | | October 19 | It's All Too Much | Yui | | October 26 | My Lonely Town | B'z | | November 2 | Boku wa Kimi ni Koi o Suru | Ken Hirai | | November 9 | Swan Song | Kinki Kids | | November 16 | Kyū Jō Show!! | Kanjani 8 | | November 23 | My Girl | Arashi | | November 30 | Loveless | Tomohisa Yamashita | | December 7 | Bandage | Lands | | December 14 | Nōdōteki Sanpunkan | Tokyo Jihen | | December 21 | Kimi ni Sayonara o | Keisuke Kuwata | | December 28 | Hatsukoi | Masaharu Fukuyama |
References {{Number-one singles in Japan}}{{Billboard}}{{DEFAULTSORT:Hot 100 number-one singles of 2009}} 3 : 2009 in Japanese music|2009 record charts|Lists of number-one songs in Japan |