https://www.heritagedaily.com/2023/01/giant-2-3-metre-long-dakoken-sword-among-unprecedented-discoveries-in-burial-mound/146053
More about the excavation from the local goverment website (https://www-city-nara-lg-jp.translate.goog/site/press-release/165641.html?_x_tr_sl=ja&_x_tr_tl=en&_x_tr_hl=ja#pagetop) in Nara. Hopefully this is the English version.
Bizarrly, when I opened up the article it came up with an advert on how to keep ones santoku kitchen knives sharp. ???