Seriously? Did she even do any films with Mousouzoku or did they just buy the rights to footage of her old films?
Or maybe the studio is a property of a bigger group that own several studios. For sure, it's not new content because the onsen scene is from KUSR-017.
Mousouzoku is a publishing house in its own right. It has a ton of labels under it (Ebisu-san, Wet Pot, Yama to Sora, Broccoli etc. etc.)
Don't recall anything on Mousouzoku by her, certainly not any lesbian work - pretty much exclusively Lezule, Madonna/Fitch and Crystal Eizou.