noun which may take the genitive case particle 'no'
nostalgic; dear; good old; longed-for
Bound adjective form used before nouns, often in fixed expressions like 懐かしの場所 or 懐かしの味. Conveys fondness for something from the past.
懐かしのメロディーが流れてきた。
A nostalgic melody started playing.
この店のラーメンは懐かしの味がする。
The ramen at this shop has a good old-fashioned taste.