The sister group is set to make its major debut.

As reported in the following article, MCZ's younger sister group, Igirinari Tohoku-San, based in the Tohoku region, performed at the Nippon Budokan for the first time, attracting an audience of about 8,000 people, and was a great success.

https://mcz.fandom.site/2025/07/younger-sister-group-makes-dreams-come.html

At the end of this live performance, it was announced that they would be making their major label debut on August 9 with Avex.

When the announcement of the major label debut was shown on the screen, the 8,000 fans who filled the venue went wild.

The leader of the group, Karen Tachibana, looked very moved as she reiterated, "We, Iginari Tohoku-San, are going to make our major label debut!"

She continued, "We said that we wanted to make Nippon Budokan not as a goal but as a start, and I'm so happy that the nine of us have really stood at the start of it and run beyond our dream with everyone else. Thank you very much."

Among the groups belonging to STA-PLA, Cho Tokimeki Senden Bu is currently a member of AVEX, and is enjoying success.

Later, a short video announcing their major label debut was posted on their official Youtube page (below).

https://www.youtube.com/watch?v=_AKsUfx6cAM