'''Sigh''' is a BlackMetal band from Japan, maybe the first ever from that country, which formed in Tokyo in 1990. They were somewhat well-known among the black metal scene in the early 1990s for being signed to Deathlike Silence Productions, the record label of {{Mayhem}} guitarist Euronymous. Beginning as a fairly straightforward BlackMetal band, they soon began to [[NeoclassicalPunkZydecoRockabilly experiment with their sound a bit]], settling on a hybrid of BlackMetal, ThrashMetal, and SymphonicMetal for ''Hangman's Hymn'' and ''Scenes from Hell''. ''In Somniphobia'' goes back to the GenreRoulette of previous works. As of 2014, they describe their style as "Cinematic Horror Metal".

The band appeared in the music documentary ''Global Metal'', where they were particularly known for the line [[MemeticMutation "metal is something cool"]], their particularly vague reaction (and for some, a TakeThat) to the VisualKei scene that currently dominates Japanese metal. While they are not a VisualKei band or associated with it, they occasionally use visuals akin to most avowed VK artists, possibly as part of their GenreBusting appeal.

!!!Current line-up :
* Mirai Kawashima - vocals, keyboard, samples, formerly bass
* Shinichi Ishikawa - guitar
* Satoshi Fujinami - bass, formerly drums & guitar
* Junichi Harashima - drums
* Mika "Dr. Mikannibal" Kawashima - alto sax, vocals

Their major releases follow ThemeNaming, with the first letter of each one being a letter of the word "Sigh".
* ''Scorn Defeat'' (1993)
* ''Infidel Art'' (1995)
* ''Ghastly Funeral Theatre'' (1997; actually an EP rather than full-length but still follows the naming convention)
* ''Hail Horror Hail'' (1997)
* ''Scenario IV: Dread Dreams'' (1999; their fifth major release but fourth full-length, hence the "IV")
* ''Imaginary Sonicscape'' (2001)
* ''Gallows Gallery'' (2005; the least BlackMetal-sounding of all their albums, a fact which got them dropped from their then-label)
* ''Hangman's Hymn'' (2007)
* ''Scenes from Hell'' (2010)
* ''In Somniphobia'' (2012)
* ''Graveward'' (release date unknown; to be recorded in mid-2014)

!!Associated tropes:

* BrainsAndBondage: Dr. Mikannibal, who really is a doctor of physics.
* ConceptAlbum: ''Hangman's Hymn'' for sure, quite possibly ''Scenes from Hell'' also.
* TheCoverChangesTheGender: Their cover of [[TeacherStudentRomance "Teacher's Pet" by Venom]] is sung by [[BiTheWay Dr. Mikannibal]].
* CoverVersion: Sigh have covered Music/{{Venom}} (quite a lot of Venom too, someone in the band must really like them), Necrophagia (not surprising as Mirai was a member of that band for at least one album), John Coltrane, and [[{{Music/Death}} Death]].
* DepravedBisexual: Mikannibal, who is bisexual, seems to cultivate this image on purpose. She has revealed in interviews that she has eaten cockroaches, drinks cow's blood before recording vocals, [[FetishFuel records vocals naked]], and enjoys [[GroinAttack urethra torture]] (inflicting it, that is).
* EpicRocking: Most releases have at least one or two really long songs. ''Infidel Art'' has five of them - only one song on that album ("Suicidogenic", at a mere 4:46) is less than eight minutes long.
* GodIsEvil: "The Summer Funeral" includes the line "God is so evil if it was his will".
* HarshVocals: On every album except ''Gallows Gallery''. Interestingly, Mikannibal's harsh vocals are usually lower-pitched than Mirai's on ''Scenes from Hell''; on ''In Somniphobia'', she employs a larger variety of vocal styles and can be either higher- or lower-pitched than Mirai, depending on which style she is utilising.
* LoudnessWar: Most of their albums to some extent, but the two worst offenders: ''Hangman's Hymn'' has a [=ReplayGain=] value of -12.53 dB, and ''Scenes from Hell'' has a value of -12.93 dB. Bloody hell. ''In Somniphobia'' appears to be mixed somewhat more quietly, with a value of -9.12 dB (at least on the mp3 version that has leaked; however, this may be due to the large number of lengthy ambient interludes, which probably drag the [=ReplayGain=] value up somewhat). Really, everything the band released on CD after 2000 is affected by this trope pretty badly, except, oddly, the original mix of ''Gallows Gallery'' (which is basically the only advantage it has over the remaster, which is much clearer in every other respect). This includes remasters of their earlier albums, such as ''Scorn Defeat''; Blood Music's reissue of ''Gallows Gallery'' is the exception, being the first release of that album to get the sound right.
* MetalScream: Both Mirai and Mika use this as their primary vocal style to the point where their vocals are usually pretty much indistinguishable. An exception to this is ''Gallows Gallery'', which contains entirely sung rather than screamed vocals. However, SopranoAndGravel is not uncommon on their recent black metal albums either, as clean vocals are used in a number of their songs since ''Imaginary Sonicscape''[='=]s "Requiem - Nostalgia", especially on ''Hangman's Hymn''.
* NeoclassicalPunkZydecoRockabilly: Frequent on their albums, but nowhere near so much as on ''Imaginary Sonicscape'', which could also pretty much be described as musical GenreRoulette, what with oddities like disco and dub reggae breaks being thrown into the middle of almost every song. Not to mention the obligatory classical snippet overlaid with what appears to be several hundred samples of giggling babies that closes the album. ''In Somniphobia'' probably doesn't carry this trope out quite as much as ''Imaginary Sonicscape'', but it's probably close.
* NewSoundAlbum: Arguably, most entries in their discography count as this. ''Gallows Gallery'' is probably the biggest standout, with the songs being substantially shorter than those on their other albums and featuring substantial PowerMetal and NWOBHM influence and no HarshVocals, although it could also be considered GenreAdultery since they never did anything else like it.
* OminousLatinChanting: ''Hangman's Hymn'' is full of it, which is to be expected considering that the album is structured as a funeral mass of sorts.
* RecurringRiff: ''Hangman's Hymn'' has many recurring melodic lines, riffs, and lyrics, culminating in the title track, which includes a section that's basically a CallBack to all the preceding songs.
* SpokenWordInMusic: Shows up occasionally, the most prominent examples being a couple of songs on ''Scenes from Hell'' feature narration by David Tibet of Music/{{Current 93}}.
* TheSomethingSong: "The Tranquilizer Song".
* WatchItStoned: Recommended by Mirai himself for ''In Somniphobia'': “Be sure to smoke first, then listen to this with headphones. Bad trip guaranteed.”