To get this mask, the first thing you have to do is to complete the Ritual of cleansing sacred Sakura, which is a mission that you will have to complete when you arrive in Inazuma for the first time and after this you can visit the Great Narukami Shrine, where you will almost always find Mae Yiko.
You will have to go to Inagi Hitomi, one of the shrine maids and talk to her. She will be near the landmark that you can use to teleport to the shrine.
To get the mask after a series of quests you will have to talk to her, so you can place it in your house as soon as you get it.
That's all you need to know about how to get a kazari mask furnishing in Genshin Impact and now that we have reached the end, we hope you can get a lot out of this mask.