also: そつど
noun
ends of the earth; outer reaches; borderland
Formal, literary term for the farthest limits of the land or the remote border regions. Rare in modern everyday language; appears mainly in classical or poetic contexts.
古典では「率土の浜」という表現で、国土の果てを指すことがある。
In classical texts, the phrase 率土の浜 can refer to the farthest shores of the land.
The exact derivation is uncertain; the kanji 率 (lead, command) and 土 (earth, land) combine to suggest 'the land under command' or 'the whole land', possibly originating from classical Chinese usage.