I've been watching the second season of the anime "Hoozuki no Reitetsu"（鬼灯の冷徹...Hozuki's Coolheadedness）, a sardonic poke at the afterlife in Hell. I caught the first couple of episodes at my anime buddy's place last year and he even gave me a copy of the season. Frankly it hasn't been my cup of ocha after 4 episodes but it's OK enough for me to get through the entire run. Never saw the first season.
Having said that, the opening theme for that second season has become a fair earworm (Ji~go, ji~go). "Dai! Jigo Jigo Bushi" (Great! Hell Hell Dance) sounds like a countrified Japanese festival tune that the cast had a fun time recording. It was done by the Jigoku no Sata All-Stars（地獄の沙汰オールスターズ...Hell's Affairs All-Stars）consisting of seiyuu Hiroki Yasumoto（安元洋貴）, Takashi Nagasako（長嶝高士）, Yumiko Kobayashi（小林由美子）, Hiroki Goto（後藤ヒロキ）, Takashi Matsuyama（松山鷹志）, Satomi Sato（佐藤聡美）, Yui Ogura（小倉唯）, Atsumi Tanezaki（種崎敦美）and the Japanese ska band YOUR SONG IS GOOD.
Was trying to find the full version but even seeing some of the cover versions and karaoke takes, it seems like "Dai! Jigo Jigo Bushi" was only meant to be a minute-and-a-half. Perhaps the full version was too devilishly taxing for everyone involved. Anyways, it was written and composed by YOUR SONG IS GOOD member Jun "JxJx" Saito（サイトウ "JxJx" ジュン）with further work on the lyrics by Gokusotsu Ongaku Renmei（獄卒音楽連盟...Devils Music Alliance）.
This version was uploaded by the Anison Kan Copy MIDI Seisaku (Omage)（アニソン完コピMIDI製作「おまげ」）.