Good opportunities are rare and should be seized when they appear.
良い機会はめったに訪れず、訪れたときは逃すべきではない。 (yoi kikai wa metta ni otozurezu, otozureta toki wa nogasu beki dewa nai)
"Don't miss the chance, opportunity knocks but once."
"チャンスを逃すな、好機は一度しか訪れない。" (chansu o nogasuna, koki wa ichido shika otozurenai)
to do something without enthusiasm
to begin performing or speaking publicly
a delicate situation requiring careful diplomacy
a very kind and generous person
an unidentified but informed source
to be in a position of leadership or power