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Formed in 2007. A four-member mood song chorus group consisting mainly of former Sentai Hero actors.
Members are Kazuyoshi Sakai （ leader ）, Yujiro Shirakawa, Shota Gogami, and Hiroaki Iwanaga. Average height 184cm.
After 3 years of preparation, they made their major debut on June 23, 2010 with "Nada no Ginza Sen" from Universal Music.
Their steady activities in hot-spring baths with the goal of "dreaming of Kohaku (red and white) and filial piety" were featured in many TV programs as "Super Sento Idol" and attracted a lot of attention.
In 2018, they made their first appearance at the 69th NHK Kohaku Uta Gassen, 11 years after the group was formed, and they have been participating for 5 consecutive years.
In addition to appearing on singing shows, they have also appeared on variety shows, information programs, and as individual members, and have been involved in a wide range of activities, including their first performance as the head of the Meiji-za Theater, the release of the movie "Super Combat Junryoku Jar" in which they star, and their activities to promote hot spring resorts in Tohoku through the theme song of the "NHK Tohoku Hot Spring Resort Support Project". He has been active in a wide range of activities.
In 2022, he released "Proposal" Saruwaishi's famous song "Like a White Cloud" under the name "Junryoku ♨ ️Daicho", a collaborative unit with the Daicho Club.
They sang "Shiroi uno no yoni" with supporting guest Ostrich Club ・ and Hiroyuki Ariyoshi at the NHK Kohaku Uta Gassen, creating a buzz.
In 2023, a new member, actor from Masked Rider ・ Hiroaki Iwanaga, joined the group, and the new Junryuke was born, unveiled as early as January 1 at "Junryuke ・ Super Premier LIVE in Kamata Onsen," a collaboration event with Kawasaki Frontale.
This year, the first year of the new group, they have already been the focus of much attention, as they have been appointed navigators of the "Meiji-za Premium Club" and are scheduled to perform as the headliners of the Meiji-za for the second time in September.