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日本珠算連盟
League of Japan Abacus Associationsnoun
は
topic markergrammar
珠算
abacus calculation; arithmetic with an abacusnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
普及
diffusion; spread; popularizationnoun, suru verb
に
direction, time, indirect object, or target markergrammar
努め
endeavor; strive; make an effort-> 努めるichidan verb
ている。
ongoing or resultant stategrammar