| Ichibu to Zenbu/Dive | |
| Cover: | B'z_ITZD.jpg |
| Type: | single |
| Artist: | B'z |
| Album: | Magic |
| Released: | August 5, 2009 |
| Genre: | Hard rock |
| Length: | 10:43 |
| Label: | Vermillion Records |
| Producer: | Tak Matsumoto |
| Prev Year: | 2008 |
| Next Title: | My Lonely Town |
| Next Year: | 2009 |
is the forty-sixth single by B'z, released on August 5, 2009, as a double A-side. This is one of the many number-one singles by B'z at Oricon Singles Chart.[1] It was a long hit, staying in the top 5 and the top 10 for 8 consecutives weeks. It also reached number one on the Billboard Japan Hot 100 and the Top Singles Sales chart.[2] [3] On December 10, 2009, it was announced that the single won the "Hot 100 of the Year" award at the Billboard Japan Music Awards.[4]
The single has received several certifications from the Recording Industry Association of Japan. "Ichibu to Zenbu" has been certified for selling more than 1,000,000 ringtones, 750,000 full-length downloads to cellphones and 250,000 downloads to PCs.[5] The physical single was certified platinum for shipped more than 250,000 copies.[6]
Chad Smith, from Red Hot Chili Peppers, and Juan Alderete, from The Mars Volta, guest appeared on this single on the drums and the bass guitar, respectively.[7] The song "Ichibu to Zenbu" was used as the opening theme in the Japanese TV series Buzzer Beat.