expression, godan verb (-ru)
be overwhelmed by a flood of emotions; be filled with deep emotion
A literary set phrase used when many feelings well up at once, often at a climactic or poignant moment. The subject is typically a person, and the phrase describes an involuntary emotional surge.
卒業式で恩師の言葉を聞き、万感胸に迫った。
At the graduation ceremony, hearing my mentor's words, I was overwhelmed by a flood of emotions.
長年の努力が実り、万感胸に迫る思いだった。
When my years of effort bore fruit, I was filled with deep emotion.