As previously mentioned in this article, due to the station improvement work at Shibuya Station, there will be a full-day suspension of the Yamanote Line on November 18, 2023 (Saturday) and November 19, 2023 (Sunday) on certain sections of the inner and outer loops.
Detailed information on the operating status of the Yamanote Line sections not affected by the suspension, as well as the operating status of lines such as the Saikyo Line, and guidance on alternative routes and transfer options have also been provided on the dedicated English page for your reference.
Source: JR East Official Page https://www.jreast.co.jp/shibuya-koji/pdf/shibuya-koji_en.pdf