Question: Dancemania Speed Presents Happy Ravers is a compilation album of "Dancemania"'s "Speed" series, released by EMI Music Japan in which year, the album features fast-paced techno, and happy hardcore music, a genre of hard dance typified by a very fast tempo (usually around 160–190 BPM), often coupled with solo vocals or sentimental lyrics?

Context paragraphs:
Dancemania Speed Best 2001: Dancemania Speed Best 2001 Hyper Nonstop Megamix, or simply Dancemania Speed Best 2001, is a greatest hits compilation album of "Dancemania"'s "Speed" series, released by EMI Music Japan in 2000.  The album features selections chosen from previously released five "Speed" albums, mostly from the earlier four issues which reached number 1 on the Oricon Foreign-music Chart respectively.

Hardtechno: Hardtechno refers to a harder and darker style of Techno music, which evolved after 2000.  While the first harder Techno productions appeared around 1991 on labels such as PCP and Industrial Strength, these were referred to as Hardcore Techno.  Over the years, the Hardcore scene cultivated a new sound far away from its Techno origins, whereas Techno itself went in a softer direction.  At the end of the 1990s, fueled by the Schranz movement, a new, extremely hard style of Techno became popular, which is now generally referred to as Hardtechno.  This style runs at very high tempos, usually around 160 bpm and features heavy distortion and prominent kickdrums.

Best of Hardcore: Dancemania Speed Presents : Best of Hardcore, or simply Best of Hardcore, is a compilation album of "Dancemania"'s "Speed" sub-series, released by Toshiba EMI in the early 2003.

Happy 2b Hardcore: Happy 2b Hardcore is a DJ mix album by Canadian DJ Anabolic Frolic.  It was released in 1997 on American breakbeat label Moonshine Music and is the first series in Frolic's "Happy 2b Hardcore" series of DJ mix albums, documenting the emergence of happy hardcore music in the United Kingdom and Europe.  The series itself is a spin-off of Moonshine's "Speed Limit 140 BPM+" series of fast-tempo dance music compilations.  The album was conceived to introduce American audiences to happy hardcore, and contains sixteen of the genre's anthems which carry many of happy hardcore's defining characteristics, such as fast tempo, frantic breakbeats, major key tonality, off-kilter, quirky keyboard effects and "semi-melodies."

Dancemania X1: Dancemania X1, a.k.a. Dancemania 11, is the eleventh set in the Dancemania series of dance music compilation albums, released in 1999 by EMI Music Japan.

Anime Speed: Anime Speed is a megamix compilation album of "Dancemania"'s "Speed" series, released by EMI Music Japan in 2005.  The album features uptempo cover remixes of popular theme songs for various anime works such as "Dragon Ball Z", "Slam Dunk" and "Neon Genesis Evangelion".  The successor, "Anime Speed Newtype Edition", was released in 2006.

Happy hardcore: Happy hardcore, also known as happy rave or happycore, is a genre of hard dance typified by a very fast tempo (usually around 160–190 BPM), often coupled with solo vocals or sentimental lyrics.  Its characteristically 4/4 beat "happy" sound distinguishes it from most other forms of hardcore, which tend to be "darker".  It is typically in a major key.  In its original incarnation, it was often characterized by piano riffs, synthetic stabs and spacey effects.  This genre of music is closely related to the typically Dutch genre of gabber.  Happy hardcore evolved from breakbeat hardcore around 1991–1993, as the original house music-based rave became faster and began to include breakbeats, evolving into oldschool jungle which evolved into drum and bass.  Some of the most famous artists of this genre include DJ Brisk, Scott Brown, Darren Styles, Hixxy, DJ Paul Elstak, Anabolic Frolic, Dune, Scooter, Critical Mass, Stu Allan (a.k.a. VISA), Dougal, Slipmatt, DJ Sharkey, DJ Gammer, DJ Sharpnel, nanobii, and DJ S3RL.

Dancemania Speed: Dancemania Speed is a sub-series of Toshiba EMI's "Dancemania" compilation series.  This series features faster, further remixed versions of recordings from previously released "Dancemania" albums or faster remixed covers of various famous songs.  Unlike the main series mostly consisting of Eurodance, this series largely consists of hardcore techno crews from the UK, the home of happy hardcore, and some Eurobeat Italians who are very much experienced in high BPM dance music. .

Dancemania Speed Presents Trance Ravers: Dancemania Speed Presents Trance Ravers is a compilation album of "Dancemania"'s "Speed" series, released by EMI Music Japan in the late 2001.

Dancemania Speed Presents Happy Ravers: Dancemania Speed Presents Happy Ravers is a compilation album of "Dancemania"'s "Speed" series, released by EMI Music Japan in the early 2001.  With the leading mixer DJ Evil, the album features fast-paced techno and happy hardcore music.

Supporting paragraphs: Dancemania Speed Presents Happy Ravers Happy hardcore
Answer: 2001