to maintain contact or communication with someone over time
時間をかけて誰かと連絡を取ること (jikan o kakete dareka to renraku o toritsudzukeru koto)
"Even after graduation, they promised to keep in touch with each other."
"卒業後も、彼らはお互いに連絡を取り続けることを約束しました。" (sotsugyō go mo, karera wa otagai ni renraku o toritsudzukeru koto o yakusoku shimashita)
to remain calm in a stressful situation
to officially agree to work or collaborate with someone
to be naturally suited for something
to formally ask someone to do something
to prepare a team with the tools or mindset they need
to start a journey; to leave a place