It looks like there will be road closures around the outside of Hanshin Koshien Stadium.
(Information provided by Chibimarue-san)
The notice↓

The closures appear to be related to expansion work on the “Ginsan” roof over the stadium’s infield seats.
Overall Schedule for the Ginsan Roof Expansion Work
The work will be carried out in four phases and proceed during the professional baseball off-season
Quoted from the PDF: Hanshin Koshien Stadium Will Extend the Ginsan Roof to the Alps Stand — Carrying on its history as the sacred ground of baseball while preserving high school baseball culture
This time, STEP 1, the foundation work, will be carried out. Completion is scheduled for 2028. Since the work is only done during the off-season, it will take quite a while.
Current Road Closure Schedule
Mizuno Square Side
Scheduled road closure dates
November 3, 2025 – March 5, 2026 (right-field side / first-base side)
South Side / Upper Right Side
Scheduled road closure dates
October 3 – 14, 2025 (around the left-field side / third-base side)
October 21 – 27, 2025 (also on the third-base side)
November 3, 2025 – March 5, 2026 (left-field side / first-base side)
*The road closure periods may be subject to change.
Lastly
The period from November 2025 to March of the following year is fairly long, so if you usually pass through the stadium area to get to Corowa or the station, please take note.
*Thank you, Chibimarue-san, for the information!!
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