I've also been looking for a good nuru provider since my ATF left a couple years ago. I have seen mialondonxo in the east bay and I thought she had a very good 1-hour fbsm+nuru+bj routine. Mia is attractive and very friendly and Filipina hapa and worth seeing at least once I think... but she's not a replacement for Niko though (sigh)
I saw
AlluraAmour_NuruQueen in SJ a few years ago (when her donation wasn't so high) and liked her nuru+bj routine, but she hasn't been getting very positive comments recently. She advertises as being part Japanese but I have heard she is just Filipina. Aiko4Wellness in the north bay is Japanese -- I saw her a few years ago for fbsm but was disappointed by her looks.
There are a few other providers that have been mentioned before like Katie Lee and Michelle Misato (who I don't think is Japanese but I could be wrong) but I haven't seen them. I wish PD had an easy way to search for nuru providers. The donations seem to vary wildly from provider to provider depending on the additional service hj vs bj vs fs