Do you have a picture of the whole plant and an intact seedpod?

sadly no.

I was brought this specimen in this condition.

here is a photo of just the seed pod (or legume) if this helps.

flesh smells like a nectarine, weird.

thanks!

Japanese Sword Bean ?? Canavalia gladiata. I've never seen it myself. Just a guess.

that looks like it!

thanks so much floral_uk!