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[JP] Chuo Shinkansen Fukuokayama Tunnel Kurita Section Delayed to Autumn 2031

Source: The Shinano Mainichi Shimbun
Original title:
リニア風越山トンネル黒田工区、5年近く遅れ　JR東海説明、完了は31年秋に
Date: June 20, 2026, 22:20
Original language: Japanese
Web link: https://www.shinmai.co.jp/news/article/ ... tfj5fltv30
Accessed: June 20, 2026

JR Central revealed on June 20 that the Chuo Shinkansen maglev Fukuokayama Tunnel Kurita section (Iida City, 2.3 km) will now complete in autumn 2031, nearly five years behind the original February 2027 schedule. At a resident meeting, the company attributed the delay to weaker-than-expected geology in the 1.1 km emergency exit tunnel, necessitating a construction method change.

[JP] Fukuokayama Tunnel Western Section Delayed Five Years Due to Weak Geology
Source: TBS NEWS DIG / Shinetsu Broadcasting
Original title:
地質が弱く、トンネル工事は約５年遅れに」リニア中央新幹線・長野県飯田市内を通る風越山トンネル西側工事完了は2031年に
Date: June 21, 2026, 12:15
Original language: Japanese

Web link: https://newsdig.tbs.co.jp/articles/-/2746017?display=1
Accessed: June 21, 2026

On the evening of June 20, JR Central announced that the western section (Kurita) of the Chuo Shinkansen maglev Fukuokayama Tunnel in Iida City, Nagano Prefecture, will now complete in autumn 2031, nearly five years later than the original February 2027 deadline. During a briefing session in Iida City, JR Central explained that weaker-than-expected geology has delayed access tunnel excavation, which began in 2023. The Fukuokayama Tunnel is divided into east and west sections, with Kurita being the western portion. The company stated that the weak geological conditions are requiring more time than anticipated. Attendees at the briefing raised concerns about noise control measures during construction.