2000 Happenings
- 11 born
- 25 new singles
- 11 joined groups
- 4 retirements
- 7 graduations
- 4 disbanded groups
- 4 new albums
- 5 new groups
- 9 new idols
- 2 left groups
January 2000
- 1 Lehua Sandbo joins Hello! Project
- 1 Lehua Sandbo joins Coconuts Musume｡
- 7 Ishiguro Aya leaves Morning Musume｡
- 7 Ishiguro Aya retires from show business
- 7 Ishiguro Aya leaves Hello! Project
- 26 Morning Musume｡ releases “Koi no Dance Site”
- 30 Kiiro 5 is formed
- 30 Aoiro 7 is formed
- 30 Chelsea Ching leaves Hello! Project
- 30 Chelsea Ching retires from show business
- 30 Akagumi 4 is formed
- 30 April Barbaran leaves Hello! Project
- 30 April Barbaran retires from show business
February 2000
- 10 Nomura Minami is born
- 19 Melon Kinenbi releases “Amai Anata no Aji”
- 19 Morito Chisaki is born
March 2000
- 8 Kiiro 5 releases “Kiiroi Osora de BOOM BOOM BOOM”
- 8 Akagumi 4 releases “Akai Nikkichou”
- 8 Aoiro 7 releases “Aoi Sports Car no Otoko”
- 27 Ogawa Rena is born
- 29 Morning Musume｡ releases “3rd -LOVE Paradise-”
April 2000
- 1 Kishimoto Yumeno is born
- 16 Yoshizawa Hitomi joins Hello! Project
- 16 Ishikawa Rika joins Hello! Project
- 16 Kago Ai joins Hello! Project
- 16 Kago Ai joins Morning Musume｡
- 16 Tsuji Nozomi joins Hello! Project
- 16 Yoshizawa Hitomi joins Morning Musume｡
- 16 Ishikawa Rika joins Morning Musume｡
- 16 Tsuji Nozomi joins Morning Musume｡
- 19 T&C Bomber releases “DON'T STOP Renaichuu”
- 21 Maeda Yuki becomes a soloist
- 21 Maeda Yuki releases “Naki Usagi”
- 21 Maeda Yuki joins Hello! Project
- 26 Hamaura Ayano is born
- 26 Morning Musume｡ , Tanpopo , T&C Bomber , Coconuts Musume｡ , Pucchimoni , Kiiro 5 , Aoiro 7 and Akagumi 4 release “Pucchi Best〜Ki Ao Aka〜”
- 27 Country Musume｡ releases “Hokkaidou Shalala”
May 2000
- 17 Coconuts Musume｡ releases “Tokonatsu Musume”
- 17 Morning Musume｡ releases “Happy Summer Wedding”
- 17 Heike Michiyo releases “One Room Natsu no Koi Monogatari”
- 21 Ichii Sayaka leaves Hello! Project
- 21 Ichii Sayaka leaves Morning Musume｡
- 30 Miyoshi Chinatsu releases “Anata no Shirts to Love song”
June 2000
- 4 Ishikawa Rika joins Tanpopo
- 4 Kago Ai joins Tanpopo
- 18 Yoshizawa Hitomi joins Pucchimoni
- 24 Shimamura Uta is born
- 28 Melon Kinenbi releases “Kokuhaku Kinenbi”
July 2000
- 1 Asami joins Country Musume｡
- 1 Asami joins Hello! Project
- 5 Tanpopo releases “Otome Pasta ni Kandou”
- 11 Kitagami Ami joins Hello! Project
- 11 Ooki Ibuki joins Hello! Project
- 11 Sheki-Dol is formed
- 12 Nakazawa Yuuko releases “Shanghai no Kaze”
- 19 T&C Bomber releases “HEY! Mahiru no Shinkirou”
- 21 Taguchi Natsumi is born
- 26 Pucchimoni releases “Seishun Jidai 1.2.3! / Bicycle Daiseikou!”
- 26 Coconuts Musume｡ releases “Watashi mo ｢I LOVE YOU｣”
- 30 Minimoni｡ is formed
- 31 Country Musume｡ releases “Koi ga Suteki na Kisetsu”
August 2000
- 9 Heike Michiyo releases “Ai no Chikara”
- 31 Inoue Hikaru is born
September 2000
- 3 Asakura Kiki is born
- 6 Morning Musume｡ releases “I WISH”
- 10 Aoiro 7 disbands
- 10 Ooura Hirona is born
- 10 Akagumi 4 disbands
- 10 Kiiro 5 disbands
- 13 Heike Michiyo releases “For ourself〜Single History〜”
- 27 T&C Bomber releases “2nd STAGE”
October 2000
- 9 Shinoda Miho retires from show business
- 9 RuRu leaves Hello! Project
- 9 Shinoda Miho leaves Hello! Project
- 9 Taiyou to Ciscomoon disbands
- 9 Kominato Miwa leaves Hello! Project
- 20 Mika joins Minimoni｡
- 25 Ishii Rika releases “Super Jet Shoes～Mirai wo Aruku Kutsu～”
November 2000
- 1 Sheki-Dol releases “Kokoro no Pheromone”
December 2000
- 6 Ishii Rika releases “Snow Paradise”
- 13 Morning Musume｡ releases “Renai Revolution 21”
- 27 Frances is born