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Sentence
Span Details
古文書
historical document; old manuscript; archives; pre-Meiji era document addressed to someonenoun
研究
research; study; investigationnoun, suru verb
は
topic markergrammar
歴史学
history (as a field of study); historical studiesnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
基礎
foundation; basis; fundamentalsnoun, no-adjective
です。
be; is; arecopula, auxiliary
出洲ですspit of land; sandspit