This article examines the popularization process of rentan and mametan (cylindrical anthracite briquettes and anthracite briquette balls) in Japanese households. It points out that the scarcity of wood and charcoal and the supply of anthracite and molasses (used as an adhesive) from Asian countries encouraged the invention and implementation of such new types of fuels in the interwar period. They were widely accepted because they did not change conventional energy use habits. The study also shows that until the diffusion of imported fluid fossil fuels such as oil and gas in the 1960s, those kinds of briquettes had been supporting the energy consumption of family units as transitional energy. In other words, while Japan was experiencing a so-called “energy revolution” from coal to oil in the industrial sector, the use of diverse energy sources continued in the household sector. These two different paths of energy consumption played a role in mitigating overall energy constraints and concurrently sustaining a high economic growth.

本文考察了仁丹和曼丹的普及过程在日本家庭中（圆柱形无烟煤球和无烟煤球）。报告指出，亚洲国家木材和木炭的稀缺以及无烟煤和糖蜜（用作粘合剂）的供应，在两次世界大战期间鼓励了这种新型燃料的发明和实施。由于它们不会改变常规的能源使用习惯，因此被广泛接受。该研究还表明，直到1960年代，诸如石油和天然气等进口的流体化石燃料扩散之前，这些煤球一直在支持家庭单位的能源消耗，作为过渡性能源。换句话说，虽然日本正在经历工业界从煤炭到石油的所谓“能源革命”，但家庭部门仍在继续使用多种能源。