Nikon Japan just confirmed that the new NIKKOR Z 180-600mm f/5.6-6.3 VR lens will start shipping on August 31, 2023 (Google translation):
Announcement of release date of “NIKKOR Z 180-600mm f/5.6-6.3 VR”
August 17, 2023
Thank you for your continued patronage of Nikon products.We would like to inform you that the release date of the “NIKKOR Z 180-600mm f/5.6-6.3 VR”, which was announced to be released in August 2023, has been decided.
Scheduled release date: Thursday, August 31, 2023
Update: B&H Photo now also lists the shipping date of the new NIKKOR Z 180-600mm f/5.6-6.3 VR lens as August 31st.
Nikkor Z 180-600mm f/5.6-6.3 pre-order links: