A tiny black substance was found in a Moderna vaccine vial in Gunma, an official from the prefecture said, while in Okinawa, black substances were spotted in syringes and a vial, and pink material was found in a different syringe.
pretty sure there was a yellow substance found as well, was either in another article or this was edited.
Japan has reported they've found 3 different types of contamination in the vaccines
https://archive.is/KvVeo
https://www.reuters.com/business/healthcare-pharmaceuticals/what-we-know-about-japans-contaminated-moderna-covid-19-vaccine-supplies-2021-08-30/
pretty sure there was a yellow substance found as well, was either in another article or this was edited.