Music has a funny way of bringing together artists who might never have crossed paths otherwise. British sisters Nyrobi and Chaya, better known as ALT BLK ERA, have found a creative partner in Japanese rapper and singer-songwriter Novel Core. Their newly released single, OKAY! OKAY!, combines heavy guitars with electronic production and rapid-fire rap, marking another step in the duo’s growing international ambitions.
The collaboration has been in the works for over a year, making its release particularly special for the sisters, who describe it as one of their biggest projects yet. Despite coming from different musical scenes, the connection between them feels natural. “Our sounds complement each other so well and it’s been an exciting creative process. Music really is borderless and this collaboration is another example of that,” explains Nyrobi.
The track also draws on Japanese pop culture, with references to Dragon Ball, Akira and Tokyo Drift woven into its lyrics. Speed and the thrill of racing become recurring motifs, reinforcing the song’s restless energy. That same spirit carries over into the accompanying music video, which expands on the collaboration’s visual identity. As Chaya puts it, “I love how it’s turned out to be such a gritty track, with the rock guitars and Novel Core’s fast and hard rap.”
Novel Core, the first artist signed to SKY-HI’s BMSG label, has developed a strong following in Japan through his distinctive approach to hip-hop and rock. The collaboration came together remotely, something the Japanese artist describes as feeling almost like they were working in the same room.
The duo’s debut album, Rave Immortal, reached number one on the Official UK Rock & Metal Albums Chart, and the sisters won Best Alternative Music Act at the 2025 MOBO Awards. Now working on their second record, the sisters are opening their creative process to musicians from around the world, with OKAY! OKAY! offering a taste of what’s to come.
