[きょうきんをひらく, kyoukinwohiraku] (exp, v5k) (See 打ち明ける・うちあける) to be frank; to speak one's mind; to open one's heart; to have a heart-to-heart talk (with someone)
[はらをわってはなす, harawowattehanasu] (exp, v5s) (See 腹を割って) to speak frankly; to speak unreservedly; to open up to each other; to talk candidly; to speak by laying everything on the table; to talk straight from the gut; to have a heart-to-heart talk