問題はこうです。

question (e.g. on a test); problem; problem (e.g. societal, political); question; issue; subject (e.g. of research); case; matter; question (i.e. doubt); public discussion; controversy; trouble; problem; inconvenience; difficulty

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

in this way (used for something or someone close to the speaker, including the speaker himself, or for the opinions of the speaker); thus; such; uh... (interjection used as a verbal pause)

be; is