In the mountain tunnel sector ranking, 安藤ハザマ retains its third consecutive championship. 大林組 overtakes 清水建設 to move into second place.
The results of the sixth installment in the mountain tunnel sector series were published, with 安藤ハザマ winning its third consecutive championship in this year's ranking. Developments this period have been highlighted as a point of interest in the sector.
Meanwhile, 大林組 overtook 清水建設 to move into second place. The makeup of the leading companies has changed, highlighting the competitive landscape.