BAND-MAID kicked off 2025 with a new digital single called “Zen,” released Jan. 13. The track is being featured as the opening theme song for ZENSHU, an original TV anime series produced by MAPPA. The collaboration between the all-women rock band and animation studio hailing from Japan with fans around the world is poised to gain a wide global audience suitable to celebrate the start of a new year. Explore Explore See latest videos, charts and news See latest videos, charts and news The five members of BAND-MAID chatted with Billboard Japan about the production process of the new single, the tracks on Epic Narratives, their first studio album in three and a half years, and their outlook for what is already looking to be a super-busy 2025 for the group. “Zen,” your new single, has a different flavor from the songs on the Epic Narratives album. Did you start working on it after you finished the album? Miku Kobato (Guitar/Vocals): It was around the same time. We were asked to write it when we were still working on the album. KANAMI started off by coming up with a number that fit the requirements for the tie-in while also having a different feel from the album. KANAMI (Guitar/Vocals): I was given the script for the main story and received quite specific requests regarding the music, so I simplified the image I had in mind to create the track. MISA (Bass/Vocals): When I listened to the demo, I thought that this song had a strong melody, so I made the bass line feel solid to bring it out. I usually tend to play bass lines that move around a lot, but this time I tried to really focus on the melody and held back on being too technical. AKANE (Drums/Percussion): I was also very aware of making a melody-oriented beat. Since many of BAND-MAID’s songs have fast BPM, this one might sound a bit mid-tempo, but I tried to avoid making it sound simply like a chilled-out mid-tempo track by adding little details, like creating beats with fills, that would become the hook. Basically, though, I wanted people to listen to the vocals throughout the song, so it’s a simple beat that supports the vocals. It might be a little simple for BAND-MAID, but when you compare it to songs by other rock bands, it’s not laid back at all. AKANE: Right. [Laughs] When the melody line is extended like this and the drums are keeping a simple eighth-note groove, it sounds mid-tempo when our band does it. But I didn’t want to erase its speedy feeling, so was conscious of creating a beat that wouldn’t get boring. In terms of the anime, it’s like being reincarnated in another world. I added a furious drum fill before the final chorus, and had these two themes of another world and the real world in my mind when I recorded it. Kobato: I’ve felt that there are surprisingly few songs with a simple feel recently, so I’m thinking of playing the guitar parts in our live shows [the band calls its concerts “Okyuji,” meaning “to serve”] in a way that would complement the catchy melody, po. SAIKI sings in a way that really brings out the story, so I tried to sing the chorus in a way that would support her from behind, changing the nuances and singing with a lot of range. The chorus work is rich, so I tried to sing it with that in mind, po. SAIKI, when you wrote the lyrics, what did you focus on in the work it accompanies? SAIKI (Lead vocals): The title “Zen” was there from the demo stage, and the ZENSHU team were like, “Perfect, that’s great,” so we kept it. I was able to really get into the work by watching all the episodes as moving images, and picked out words from the story and incorporated them into the lyrics. ZENSHU taught me all kinds of things about being an animator, the profession of the protagonist, and thought it’d be nice to convey how creators like that feel. I think musicians and animators are the same in that we both create, so there were lots of parts I could relate to as a musician, and the lyrics in the chorus also reflect how we feel as BAND-MAID. When (an anime) is based on a work that exists, you might already like it and be able to get into it right away, but since ZENSHU is an anime by MAPPA with an original story, I imagine it must have been difficult to grasp its worldview and reflect that in the lyrics. SAIKI: It was. [Laughs] But I went over the plot and script and everything many times and worked on it after becoming a fan before anyone else. I felt that the song was “kayou [vintage Japanese pop music] rock.” We don’t often do songs in that style, and because of that, I figured my lyrics would reach people without sounding off, so I did pretty much what I pleased. As a vocalist, I recall recording it in a simpler way. In the first verse, I did simple chorus work, and from the second verse I tried to show off my own quirks, and added more and more harmonies to each chorus. In terms of the performance, the descending part at the end of the chorus is memorable. What was the inspiration for that arrangement? KANAMI: I wanted to create a kind of conclusion to the song. I also considered ending all together with the members, but since the work is about reincarnation, I wanted to include a fantasy-like image. Your guitar solo, on the other hand, has an ascending, chaotic nuance that’s cool. KANAMI: Thank you, I like it myself. It’s quite difficult technically, but I always want to play melodies that stick in your ears, and I think I’ve created a guitar solo that leaves a strong impression. On the Zepp