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日本鉄道建設公団
Japan Railway Construction Public Corporationnoun
は、
topic markergrammar
新幹線
Shinkansen; bullet trainnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
建設
construction; building; establishmentnoun, suru verb
に
direction, time, indirect object, or target markergrammar
大きな
big; large; greatpre-noun adjective
役割を果たした。
play a role; serve a function; play a part-> 役割を果たすexpression, verb