苦心: pain, trouble, anxiety, diligence, hard work

苦心: struggle to do

時空: time-space

遺族: bereaved family

医薬: medicine / 意訳: liberal translation / 違約: breach of contract

(weaponry) a Japanese throwing weapon, possibly derived from a masonry trowel

(informal, slang) isn't it, aren't you (said when seeking confirmation from the listener)

空自: Short for 航空自衛隊 (Kōkū Jieitai, “Japan Air Self-Defense Force, JASDF”).

久野: a surname

水鶏, 水雉, 秧鶏: a water rail