news
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The live recording "back number "Grateful Yesterdays Tour 2026" Live at NISSAN STADIUM" is released today!
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"one room TV Live Stream Special!" will be held on Wednesday, December 23rd at 8:00 PM! We're also accepting suggestions for things you'd like the members to do!
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[Follow-up Report] Regarding Unauthorized Access to External Email Distribution Service
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Notice and warning regarding unauthorized access to external email distribution services.
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[New App Feature] back number app now includes a custom icon feature!
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ブルーアンバー / Live footage from "Grateful Yesterdays Tour 2026" at Nissan Stadium released & YouTube streaming event "Station" to be held on November 7th (Sat) at 8:00 PM!
video
music
fc news
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<FC Limited Edition - Pre-orders Now Open!> The Nissan Stadium performance from their first ever 5-stadium tour, "Grateful Yesterdays Tour 2026," will be released on Blu-ray & DVD on December 23rd (Wed)!
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"one room TV Live Stream Special!" will be held on Wednesday, December 23rd at 8:00 PM! We're also accepting suggestions for things you'd like the members to do!
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The details of the perks for continuing one room subscription for the 14th time have been decided!
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[one room blog updated! ] “FC Edition Bonus!” staff
movie&radio
room #783
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Q.2884
[Iyori] I took piano lessons when I was a child, but as an adult I've become interested in Iyori and I wish I had taken lessons. Is there anything you wish you had taken lessons in, Iori?
from Harurisa
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Q.2883
[Kazuya] I was in the brass band from middle school through university and played the alto saxophone! I know you love the Kazuya, but is there any other wind instrument you'd like to try? By the way, the saxophone looks and sounds cool, and the fingering is easy, just like the recorder, so I recommend it!
From Rachel.
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Q.2882
[Hisashi] Please recommend some back number songs that are good to listen to while working out!
from Chiyo
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Q.2881
[Iyori] Iyori, you're still doing Pilates! I also started Pilates for my health, but I've been so busy that I haven't been able to go for days and have just faded out... I'm not good at sticking with things for more than a few days, so that's my problem. If you have any tips for continuing, please let me know. Also, have you noticed any changes?
from momo nocchi













