Ohotomo no
uji to na ni oheru
masurawo no tomo.
8 ta-nigiri, ta is emphatic.
18 kuni-magi appears to mean, opening the country.
20 kotomuke.
22 yahashi, quell.
39 he = kata.
45 umi no ko, progeny, descendants.
48 Note the rare form tsugitete (tsugitsutsu).