約束を守らないのは無責任というものだ

N4 約束 yakusoku promise, appointment, arrangement N5 ない nai there isn't, doesn't have N3 無 mu nothing, absence, nonexistence N3 責任 sekinin responsibility, duty

N3 約 yaku / tsuzu.maru, tsuzu.meru, tsuzuma.yaka promise, approximately, shrink N3 束 soku / taba, taba.neru, tsuka, tsuka.neru bundle, sheaf, ream N3 守 shu, su / mamo.ru, mamo.ri, mori, -mori, kami guard, protect, defend N3 無 mu, bu / na.i nothingness, none, ain't N3 責 seki / se.meru blame, condemn, censure N3 任 nin / maka.seru, maka.su responsibility, duty, term

N3 〜というものだ to iu mono da Indicates general judgment or evaluation based on common sense, attaches to a sentence, means that is exactly what it means or it is natural that N3 〜ものだ mono da Indicates general truth common habit advice or nostalgic memory, attaches to verb adjective or noun, means it is common that or I remember that N4 〜という to iu Indicates name, definition, quotation, or explanation, attaches to a word or sentence, means called, said that, or that is N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜と to Indicates company, quotation, natural condition, complete list, or direct connection between elements N5 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase N5 〜も mo Means also, adds another similar item, often replaces particles such as wa ga or o N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information