Unknown wildflower

Ulivio

Hi everybody

I found this nice yellow wild flower in southern Japan.

It is low-growing, creeping, a bit succulent (but definetely not a Portulaca), rhizomatous roots...

Any guess?

Thanks

G

DimWit

Sedum sarmentosum?

Ladybird4

Sedum aizoon?

Buttercupdays

Saxifraga aizoides - Yellow Mountain Saxifrage, I think.