April 1, 1990: As the Miyazu Line was transferred to Kitakinki Tango Railway Corporation (KTR), 'Tango' nos. 9 and 6, which had been operated as local trains on the line, started being operated as express trains.
1990年（平成2年）4月1日、宮津線、北近畿タンゴ鉄道移管に伴い、同線を普通列車で運行していた「丹後9号・6号」を全線急行列車化。