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Sentence
Span Details
日本
Japannoun
は
topic markergrammar
高齢化社会
aging society; ageing societynoun
が
subject markergrammar
進ん
advance; go forward; move ahead; precede; go ahead; lead; make progress; improve; deepen; heighten; intensify; be fast (clock); be ahead; gain time; do willingly; do of one's own accord-> 進むgodan verb
でいる。
ongoing or resultant state-> ているgrammar