Where can I donate my old medical boot?

I injured myself, and had to use a medical boot for a while, but no longer need it, and want to pass it on before leaving Tokyo. I'm an American staying in the Suginami area. Are there places where I could donate something like that?

https://preview.redd.it/soe11fb7vftf1.png?width=1200&format=png&auto=webp&s=3335416d52965e3343a392a567d132a58ab24d17