the FIR emission in metal-poor environments with the aid of theoretical models for dust emission.

This paper is organized as follows. First, in Section \[sec:model\], we describe the models of dust emission with a simple radiative transfer recipe. Then, in Section \[sec:data\], we explain the data analysis of the BCD sample observed by *AKARI*. In Section \[sec:result\], we overview the results of the model calculations in comparison with the observational data. In Section \[sec:discussion\], we discuss our results, focusing on the relation between FIR colour and dust content. Finally, the conclusion is presented in Section \[sec:conclusion\].

FIR SED Model {#sec:model}
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We adopt the theoretical framework of @draine01 to calculate the SED of dust emission in FIR. The framework has already been described in @hirashita07 [hereafter HHS07], but we modify it to treat BCDs in this paper. Moreover, [as described in the last paragraph in Sect. \[subsec:isrf\],]{} we newly include the effect of radiative transfer in a similar way to @galliano03. We overview our framework, focusing on the change from HHS07.

Interstellar radiation field {#subsec:isrf}
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The stellar SEDs of BCDs are generally harder than those of spiral galaxies [@boselli03]. @madden06 also show a hard stellar radiation field from the 