Volumes 1 and 2 on sale NOWDigital versions can be bought on Amazon Japan, Rakuten and Book Walker
Print versions also on amazon Japan, Rakuten, 7net, Honto and Yodobashi.
Extra goodies when bought on specific stores (Gamers, Tsutaya, Melonbooks, Mangaoh, Toranoana, Comic Zin and affiliated stores - some offer international shipping)
Details here:
https://storia.takeshobo.co.jp/news/2024/02/16/20240216_oshirase003_shakunetsuno.htmlAsano Yagura's exposure dollars HERE:
https://storia.takeshobo.co.jp/manga/shakunetsuno/(Support using real dollars now available)