https://www.amazon.co.jp/SWORD-BREAKER-1-ジャンプコミックスDIGITAL-梅澤春人-ebook/dp/B073XLRR32 A long time ago, in a certain world, the evil magician Aval was thoroughly defeated by a brave man Ruldo, who carried "Sword Breaker". Unfortunately, Ruldo was banished by Aval's curse into a different world. Now, will the call for a hero bring Ruldo back into his original world once more?
You made a forgotten title thread with a video stating the title and a copy-paste of the MAL summary? What, exactly, was the point?
Just a stab in the dark, but my guess they know the title for the anime and webnovel, but the manga adaptation was named something else.
looking at the cover on Amazon link, i doubt it would be named something else. edit: sure enough https://www.mangaupdates.com/series.html?id=3234
Actually it's so I could reach my goal of $1600, so I can get somebody to translate this: https://forum.novelupdates.com/threads/in-search-of-the-epitaph-keijo-showa-year-62.92181/