No English name was found on the official site, so the facility name and address are romanized from the Japanese reading.

Address

2-1 Tamamo-cho, Takamatsu, Kagawa

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Official site (Japanese)

https://www.city.takamatsu.kagawa.jp/kurashi/kurashi/shisetsu/park/tamamo/

Hiunkaku Garden. Garden at the Takamatsu Castle ruins