yuzu

I got a plenty of YUZU:

If you have a lot of yuzu (citron) in season, you may want to try making yuzu vinegar. It can be used in a variety of dishes such as salads, soaked sushi, sushi, grilled fish and meat, etc. It is also an effective way to consume limonene and hesperidin, components of yuzu that are said to be good for blood vessels and blood flow. All you need to prepare is yuzu and about 10% salt to the amount of yuzu juice, and it is very easy to make, so please give it a try.
Cut the yuzu in half and squeeze it. Squeeze out as much of the skin extract as possible.
Add salt to the juice and mix.
Let it sit in the refrigerator for a day and voila!

Translated with www.DeepL.com/Translator (free version)

旬の時季、ゆずがたくさん手に入ったら作ってみたいのが「ゆず酢」だ。これは、サラダやお浸し、寿司、焼き魚や肉にかけるなど様々な料理に使えるうえ、血管や血流に良いとされるゆずの成分リモネンやへスペリジンを有効に摂取できるもの。用意するものは、ゆずとゆず果汁量に対して約1割の塩だけ｡作り方もいたってカンタンなので、ぜひ1度試してほしい。
ゆずを半分に切って絞る。皮のエキスもできるだけ絞り切る。
果汁に塩を加えて混ぜる。
冷蔵庫で1日寝かせて出来上がり。