Glad I was able to help, those are some great prints! fwiw, there is also an online catalog of Kasamatsu Shrio's prints and it looks like these are your prints

Glad I was able to help, those are some great prints! fwiw, there is also an online catalog of Kasamatsu Shrio's prints and it looks like these are your prints there: https://shirokasamatsu.art/catalog/red-gate-in-the-rain/ https://shirokasamatsu.art/catalog/red-gate-in-the-rain/ https://shirokasamatsu.art/catalog/red-gate-in-the-snow/ https://shirokasamatsu.art/catalog/red-gate-in-the-snow/