修撰[shuusen] editing
撰集[senjuu] selection (e.g. of poems, texts)
勅撰[chokusen] compilation for the emperor
杜撰[zusan] careless
撰ぶ[erabu] to choose

新撰[shinsen] newly compiled, selected or edited
百撰[hyakusen] top hundred
特撰[tokusen] specially selection
勅撰集[chokusenshuu] imperial-commissioned poem anthology
撰者[senja] author