Another update coming from JTB’s IROS support service:

Starting from 7th September 2022, Japan NO longer requires a negative pre-departure COVID-19 test for boosted travelers who have had three vaccine shots. Please check more details about this at the IROS2022 Health and Safety page: Health and Safety – IROS 2022.

Due to a recent change in the Japanese government policy, installation of the COCOA (Covid close-contact tracing) application is not requested by the IROS2022 SC2 Committee anymore. For further details, please check: https://iros2022.org/2022/08/25/for-attention-of-iros2022-onsite-participants/.