This is a list of number one singles on the Billboard Japan Hot 100 chart in Japan in 2010.
DateSongArtist January 13 "Fly Away" Rake January 20 January 27 "Gloria" Yui February 3 "Break Out!" Tohoshinki February 10 "Modorenai Ashita" Aiko February 17 "Love Yourself (Kimi ga Kirai na Kimi ga Suki)" KAT-TUN February 24 "Sakura no Shiori" AKB48 March 3 "Hitomi no Screen" Hey! Say! JUMP March 10 "Troublemaker" Arashi March 17 March 24 "Sakura" Monkey Majik March 31 "Toki o Tomete" Tohoshinki April 7 "Sakura Girl" NEWS April 14 "Yūki 100%" NYC April 21 "Happy" Bump of Chicken April 28 "Mahō no Ryōri (Kimi Kara Kimi e)" May 5 "Go! Go! Maniac" Ho-kago Tea Time May 12 "Arigatō" Ikimono-gakari May 19 "Going!" KAT-TUN May 26 "Monster" Arashi June 2 "Ponytail to Chouchou" AKB48 June 9 "Rain" Sid June 16 "Victory" Exile June 23 June 30 "Okay" Koshi Inaba July 7 "Wonderful World!!" Kanjani Eight July 14 "To Be Free" Arashi July 21 July 28 "This Is Love" SMAP August 4 "One in a Million" Tomohisa Yamashita August 11 "This Is Love" SMAP August 18 "Hotaru" Masaharu Fukuyama August 25 "Heavy Rotation" AKB48 September 1 "Life (Me no Mae no Mukō e)" Kanjani Eight September 8 "Wildflower" Superfly September 15 "Love Rainbow" Arashi September 22 "Motto Tsuyoku" Exile September 29 October 6 "Kimi ni Todoke" Flumpool October 13 "Dear Snow" Arashi October 20 "Uchūhikōshi e no Tegami" Bump of Chicken October 27 "Yoku Asobi Yoku Manabe" NYC November 3 "Beginner" AKB48 November 10 "Fighting Man" NEWS November 17 "Hatenai Sora" Arashi November 24 "Change Ur World" KAT-TUN December 1 "Goodbye Happiness" Hikaru Utada December 8 "Family (Hitotsu ni Naru Koto)" KinKi Kids December 15 "Chance no Junban" AKB48 December 22 "Arigatō (Sekai no Doko ni Ite mo)" Hey! Say! JUMP December 29 "A winter fairy is melting a snowman" Kaela Kimura
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