Yuzu (Citrus × junos) is a citrus fruit and plant in the family Rutaceae of Chinese origin. Yuzu has been been grown mainly in Kochi Prefecture in Japan.
https://en.wikipedia.org/wiki/Yuzu; https://www.kpta.or.jp/yuzu/
In Yamanashi Prefecture, the town of Fujikawa is well known for its produce.
https://en.wikipedia.org/wiki/Fujikawa,_Yamanashi; https://www-town-fujikawa-yamanashi-jp.translate.goog/kanko/?_x_tr_sl=ja&_x_tr_tl=en&_x_tr_hl=ja
Yuzu (Citrus × junos), Showa and Fujikawa, Yamanashi, 12/21/2025 and 12/19/2024
Today is the winter solstice in this year. Traditionally, people take a yuzu bath on the winter solstice in Japan.
https://en.wikipedia.org/wiki/Winter_solstice; https://en.wikipedia.org/wiki/Yuzu_bath
From the NHK Wold Japan News “Capybara soaking in a warm bath”: https://www3.nhk.or.jp/nhkworld/en/news/20251222_08/