Japanese teacups and saucers

Delicate bone china Japanese teacups. Set of 3 cups but 4 saucers Saucers also make lovely candleholders with votives or tealights Gold key patterned gilding that has a lovely patina and some wear. Saucers are marked “made in Nippon” (🇯🇵) and “hand painted” with a company mark that I have not researched. Cups are unmarked.