- 2014 - present
- ジャク official website
- Vocal, Rock
- RAT1959 — Arrangement ,Lyrics ,Guitar & Drums programming
- buoy — Arrangement, Bass, Guitar & Drums programming
Jaku is a Touhou doujin music circle who primarily arrange themes associated with the amanojaku Seija Kijin. Music by the circle is arranged and preformed by members RAT1959 & buoy with guest vocals being contributed by マテ茶ん & Riku. Planning for the circle is done by Sally members ワニ and NSY with ワニ handling general assistance and promotion while NSY handles the Mix & Mastering for the music.