FWIW, I grew up in a Japanese neighborhood in Los Angeles, Biwa (loquat)
leaf tea was popular with the older generation 50 yrs ago. Same with
persimmon leaf tea (from the crispy type persimmons). Through the years
I've seen persimmon (KakI) leaf tea in the market, but don't recall
ever seeing Biwa leaf tea. Persimmon leaf was supposedly an anti-scurvy
herbal tea-a source of vitamin C?