i-adjective
reminiscent of the good old days; nostalgia-inducing
Describes something that evokes fond memories of the past, often with a warm, sentimental feeling.
この曲は昔懐かしいメロディーだ。
This song has a melody that reminds me of the good old days.
祖母の家には昔懐かしい道具がたくさんある。
At my grandmother's house, there are many tools that bring back fond memories.