List of Oricon number-one singles of 1991

This is the list of number-one singles in Japan during 1991 according to Oricon Chart^[1]

January 7	(No information)
January 14	"Ai wa Katsu" (愛は勝つ)	Kan
January 21
January 28
February 4
February 11
February 18	"Oh! Yeah!/Love Story wa Totsuzen ni"	Kazumasa Oda
February 25
March 4
March 11
March 18
March 25
April 1
April 8	"Lady Navigation"	B'z
April 15
April 22	"Wednesday Moon"	Hideaki Tokunaga
April 29	"Lady Navigation"	B'z
May 6	"Eyes to Me"	Dreams Come True
May 13
May 20	"Kiss"	Princess Princess
May 27	"Please"	Shizuka Kudo
June 4	"Love Train"	TMN
June 10	"Anata ni aete yokatta" (あなたに会えてよかった)	Kyōko Koizumi
June 17
June 24
July 1
July 8	"Beat Emotion"	Tomoyasu Hotei
July 15	"Anata ni aete yokatta" (あなたに会えてよかった)	Kyōko Koizumi
July 22	"Neo Bravo!!"	Southern All Stars
July 29	"Donna Toki Mo." (どんなときも)	Noriyuki Makihara
August 5	"Say Yes"	Chage and Aska
August 12
August 19
August 26
September 2
September 9
September 16
September 23
September 30
October 7
October 14
October 21
October 28
November 4	"Shabontama" (しゃぼんたま)	Tsuyoshi Nagabuchi
November 11	"Alone"	B'z
November 18
November 25	"Wild Heaven"	TMN
December 2	"Boku wa kono hitomi de usowotsuku" (僕はこの瞳で嘘をつく)	Chage and Aska
December 9	"Piece of My Wish"	Miki Imai
December 16
December 23
December 30	"Sore ga Daiji" (それが大事)	Daiji-man Brothers Band

References

1. http://www.oricon.co.jp/search/result.php?kbn=js&types=rnk&year=1991 ^{[dead link]}