I’m trying to find the name of an atrist?

I remember that when I first looked her up there was a rather iconic photo of her on a train wearing something reflective. She also made a sculpture or house of some sort that was oval-shaped. Sorry for the vagueness. Would appreciate the help.

https://www.reddit.com/r/japan/comments/uwh24c/im_trying_to_find_the_name_of_an_atrist/