The AKB48 sub-unit Watarirouka Hashiritai has added two more members for its next single: Team B's Mika Komori (16) and Team A's Misaki Iwasa (15). It is not yet clear whether this is a permanent change, but for the time being, the group has changed its name to Watarirouka Hashiritai 7 to reflect the size of the new lineup. They will release a single under that name in February, though the title is unannounced.
Watarirouka Hashiritai was originally formed in 2008 as a four-member group with Mayu Watanabe, Aika Ohta, Haruka Nakagawa, and Natsumi Hirajima. Ayaka Kikuchi joined earlier this year as their fifth member.
This past June, Komori and Iwasa joined the other five members to launch a new radio show called "Watarirouka Hashiritai 7." Their participation was originally limited to radio activities, but this single will mark their first release together as a unit.
The new single is described as a Valentine's song created by AKB48's producer Yasushi Akimoto. It is scheduled for release on February 2, 2011.