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{{Infobox Single
| Name           = Ai no Bakudan
| Cover          = 38s.jpg
| Artist         = [[B'z]]
| from Album     = [[THE CIRCLE]]
| Released       = March 9, 2005
| Recorded       = 
| Length         = 22:06
| Label          = Vermillion Records
| Producer       = Tak Matsumoto
| Promotions     = #1 ("Japan Countdown" ED Theme March 2005)<br>#1 (Zespri's "Gold Kiwi" CM Theme)
| Last single    = "[[ARIGATO]]"<br/> (2004)
| This single    = "'''Ai no Bakudan'''"<br/>(2005)
| Next single    = "[[OCEAN]]"<br/> (2005)
}}

'''Ai no Bakudan''' ''(愛のバクダン, Love Bomb)'' is the thirty-eighth [[B'z Singles|single]] by [[B'z]], released on March 9, 2005.  To date, it remains one of the most popular songs produced by the band, frequently seeing inclusion on the majority of [[LIVE-GYM]] tours since release. One month after its release, it would be collected along with one of its B-sides on the band's fourteenth album, ''[[THE CIRCLE]]''. In addition, "Ai no Bakudan" would be collected on ''[[B'z The Best Pleasure II]]'' in 2005, as well as ''[[B'z The Best ULTRA Pleasure]]'' in 2008. A remixed version would also serve as the lead track from the band's [[B'z EP|first international EP]] on iTunes in 2007, but has since become unavailable.

The title song was composed and arranged to be a "simple" song that could be covered by experienced and aspiring musicians alike. As such, the song features a "back to basics" approach with only vocals, guitar, bass, and drums. To compliment this approach, the release came coupled with complete guitar tablature for "Ai no Bakudan" printed on the back of the lyrics sheet. For purposes of learning the song in full, the limited edition included a karaoke track free of the lead vocals as well as a "Guitar Solo Less" version that would allow beginner guitarists the opportunity to play along with the song without the solo. With five total tracks, the limited edition also makes it the biggest single B'z has released.

The single became an immediate hit for the band upon release, topping the Weekly Oricon Singles chart for the week of its release—becoming the thirty-fourth consecutively for the band to do so—and remaining on the charts for fourteen weeks. It would be the twenty-seventh highest selling single for the year, becoming one of two singles released by B'z in 2005, with the other being "[[OCEAN]]".

The first two tracks on the release, "Ai no Bakudan" and "Fever", would be permanent fixtures on the setlist for [[B'z LIVE-GYM 2005 "CIRCLE OF ROCK"]]. Although a full home video release initially did not materialize, special editions for one of the band's three 2006 singles, "[[SPLASH!]]", came bundled with performances from the tour. Of note was the green-colored version being bundled with a performance from the tour of "Ai no Bakudan", while the yellow edition included "Fever". In 2013, ''[[B'z LIVE-GYM 2005 -CIRCLE OF ROCK- (Home Video)|B'z LIVE-GYM 2005 -CIRCLE OF ROCK-]]'' was finally released in full on DVD as one of three home videos to begin the band's 25th anniversary celebrations.

The single would make appearances on several Japanese programs in a rare year for numerous B'z television appearances. Televised performances took place on a number of occasions, including "Music Fighter", "Music Station", and "CDTV", which would make it the song most performed by B'z on television. The most notable appearance of 2005 came on retrospective program "Bokura no Ongaku" (''Our Music'') in which the band were interviewed at length on a number of subjects, including the origin of the song. In addition to the interview, studio performances of "Ai no Bakudan", in addition to its B-side, "Fever", and classic single "[[love me, I love you]]" were shown. In 2012, for the annual Christmas special, "Ai no Bakudan" would return to the "Music Station" stage with B'z performing the song coupled with another recent hit, "[[Ichibu to Zenbu/DIVE|Ichibu to Zenbu]]".

In a rare turn, more than one promotional video was filmed for the title song. The primary version was filmed in Japan and features the band performing on a sound stage with pyrotechnics surrounding the band. The video, which was also made available in full to members of [[B'z PARTY]], featured an electric guitar intro as opposed to the original track's acoustic guitar. A secondary version filmed in the United States was also made public, as well as one that features Tak and Koshi on a playground swingset for the video's duration. In addition to its promotional videos, "Ai no Bakudan" was also promoted as the ending theme to music show "Japan Countdown" for March 2005 and as being the theme song to commercials for Zespri's "Gold Kiwi" fruit line.

In 2012, seven years after its original release, an English version titled "[[B'z (English Album)|Love Bomb]]" served as the opening track for the band's [[B'z (English Album)|self-titled digital English debut]] and [[B'z LIVE-GYM 2012 -Into Free-|ensuing North American tour]].

== Track listing ==
#'''[[Ai no Bakudan (Lyrics)|Ai no Bakudan]]''' — ''Love Bomb'', 愛のバクダン
#: 
#'''[[Fever (Lyrics)|Fever]]'''
#: The catchy, hard rock-infused rhythm and feel of the song was conceived with "an image like KISS" in mind, according to Tak. The song proved popular on the [[B'z LIVE-GYM 2005 "CIRCLE OF ROCK"|CIRCLE OF ROCK]] tour, and was collected on the band's album ''[[THE CIRCLE]]'' along with the title song. This marked the first instance that both the A-side and B-side were collected on the following studio album since "[[LADY-GO-ROUND]]" in 1990.
#'''[[Amaku Yasashii Binetsu (Lyrics)|Amaku Yasashii Binetsu]]''' — ''A Sweet & Gentle Low-Grade Fever'', 甘く優しい微熱
#: One of several B-sides by the band [[B'z Songs Never Performed Live|never performed live]], and can only be found on this release.
#'''[[Ai no Bakudan (Lyrics)|Ai no Bakudan <small>(TV STYLE)</small>]]''' — ''Love Bomb'', 愛のバクダン <small>(TV STYLE)</small>'''
#: Available only on the limited edition. This version of the song is a karaoke version of the title song and removes all lead vocals, leaving only the backing vocals in place. This would be the first karaoke version released by the band since the two karaoke collections of ''[[B'z TV Style SONGLESS VERSION]]'' in 1992 and ''[[B'z TV STYLE II Songless Version]]'' in 1996.
#'''[[Ai no Bakudan (Lyrics)|Ai no Bakudan <small>(GUITAR SOLO LESS)</small>]]''' — ''Love Bomb'', 愛のバクダン <small>(GUITAR SOLO LESS)</small>'''
#: Available only on the limited edition. This version, as the title implies, retains all aspects of the original version apart from the guitar solo.

* Limited Edition (CD): '''「Ai no Bakudan (TV STYLE)」''' & '''「Ai no Bakudan (GUITAR SOLO LESS)」'''

== Personnel ==

'''B'z'''
*[[Tak Matsumoto]]: Guitar, Music Composition, Arrangement
*[[Koshi Inaba]]: Vocals, Lyric Composition, Arrangement

'''Drums'''
*

'''Bass'''
*

'''Production'''
*