MOETAN is a series of English language study aid published by SansaiBooks in Japan. Targeted at otaku, it attempted to teach English words using examples drawn from computer games and anime.
In the reprint of the first MOETAN book and the bath towel sold during Comic Market 69, MOETAN stands for 'Methodology Of English, The Academic Necessity'. The acronym may have been chosen as a play on combining the words moe and -tan, both terms of cuteness used in relation to girl characters in anime, to create a portmanteauic double meaning.