"One Two Three / The Matenrō Show" (One・Two・Three／The 摩天楼ショー) is the 50th single by the J-pop group Morning Musume.

The single will be released in seven versions: a regular edition and six limited editions: A, B, C, D, E, and F. All limited editions will contain an additional song: A and B – a track sung by the 6th generation members (Sayumi Michishige and Tanaka Reina),[5][6] C and D – a track sung by the 9th generation members (Mizuki Fukumura, Erina Ikuta, Riho Sayashi, Kanon Suzuki),[7][8] E and F – a track sung by the 10th generation members (Haruna Iikubo, Ayumi Ishida, Masaki Sato, Haruka Kudo).

[11] Also, all the limited editions will include an entry card for the lottery to win a launch event ticket.

In August 2012, the single was certified Gold by the Recording Industry Association of Japan for shipment to retailers of 100,000 units.

[12] One Two Three Vocalists Main Voc: Reina Tanaka, Riho Sayashi Center Voc: Sayumi Michishige, Mizuki Fukumura, Masaki Sato Minor Voc: Erina Ikuta, Kanon Suzuki, Haruna Iikubo, Ayumi Ishida, Haruka Kudo The Matenrou Show Vocalists Main Voc: Reina Tanaka Center Voc: Riho Sayashi Minor Voc: Sayumi Michishige, Mizuki Fukumura, Erina Ikuta, Kanon Suzuki, Haruna Iikubo, Ayumi Ishida, Masaki Sato, Haruka Kudo Sealed into the Limited Editions A, B, C, D, E, F: