Toho is re-releasing all of the Godzilla movies on DVD ahead of the release of the new film Shin Godzilla.
These movies, which include the American Godzilla films, will feature added content including audio commentary, postcards, stickers, as well as having special packaging.
They will be released on June 15, 2016 and retail for 2700 yen (approx $24 US) and will be available from Amazon Japan and maybe available through other retailers as well.
These are Japanese releases and are not available outside of Japan for other regions.
It is odd that these are being released since they have all been released on Blu-ray recently for Godzilla's 60th Anniversary only two years ago.