setting idle chatter aside and returning to the main topic

chickens come home to roost, so you should be prepared for your curse to come back to you. Also said to admonish someone against cursing another person casually.

Rare form of テコンドー (tekondō, “taekwondo”).

arduous is the race against time as one grows old. (literally "as the sun goes down, the road remains a long one.")

Kyūjitai form of 道徳経 (“Tao Te Ching”)

Wide-Area Administration: a proposed plan to merge prefectures to create new local administrative divisions.

Kyūjitai form of 合気道 (“aikido”)

(martial arts) Jeet Kune Do

Kyūjitai form of 伝道の書

the Kōdōha (or the Imperial Way Faction); a totalitarian, militaristic and expansionist faction in the Japanese military during the early Shōwa era