Fig. 1From: Transformation of the company system and birth of the “white-collar” miner: the case of progressive company Taiheiyo Coalmine during the period of economic growth in JapanWage system in the coal industry: major companies (Shimanishi 2013). *The proportion of contract-based wage to fixed wage is different for every company. *Taken from Sekitan Rôdo Nenkan, 1953Back to article page