Aw, well I can confirm that OP captioned it in Japanese as Okinawa Suzume-uri, which is used in Chinese medicine iirc, but I don’t know what all for. I don’t think you usually eat it. (I guess Bryonopsis laciniosa, which is the name I find for Okinawa Suzume-uri, is the same as Diplocyclos palmatus. I wish a botanist would come explain why they do this.) Suzume Uri is the cutest name, though. Sparrow Melon! (Or gourd)
Some google translate and wikipedia work has informed me this is Diplocyclos palmatus (Native Bryony), or maybe something else in the Bryonia genus. I’m not a botanist, so if someone more qualified wants to jump in that’d be great.
I want to know:
A) Is it eaten, or used for medicine, or both? There seem to be some scientific or pharmocological interest in it, but it’s also a gourd.
B) Where / how does it grow?
C) Is this one the invasive “Lollipop Climber”?