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Nijisanji and Magniflex Extend Collab With Rou Koyanagi Sleep Stream

The fourth edition brings a new personality into the brand campaign, with Rou Koyanagi's showroom experience and home use forming the basis of the stream's content alongside returning collaborator Ittetsu Saeki.

Reporting from 1 source: PANORA.

Nijisanji and Magniflex Extend Collab With Rou Koyanagi Sleep Stream

The Nijisanji and Magniflex collaboration reaches its fourth edition with a new distribution on August 19. Rou Koyanagi joins the series, hosting a stream on his YouTube channel where he will report on his experience at the Omotesando showroom and discuss his ideal sleep environment. Ittetsu Saeki, a recurring presence in the collaboration, also appears.

The fourth installment of the Nijisanji and Magniflex collaboration shifts to Rou Koyanagi's YouTube channel for its August 19 broadcast. The stream is framed as a "Mattress Bond-Building Buddy Novel SLG" and includes Koyanagi's report from the Omotesando showroom, a segment titled "Let's decide black or white! Invitation to peaceful sleep ~BLACK OR WHITE? 2nd season~," and "Oklahoma Chronicle ~Black partner and ultimate sleep~."

Koyanagi selected products at the showroom and tested them at home before the broadcast. Ittetsu Saeki, who has appeared in every edition of the collaboration since it began in March 2025, joins him. The series has previously featured Mana Hibachi and Sei Kaisei alongside Saeki in conveying the importance of healthy sleep.

Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.

Sources