Definition of 懐古 (かいこ)
かいこ
                        懐古
かいこ
kaiko
Common word
noun
•
        
reminiscence, nostalgia, thinking fondly of the past, recalling the old days
Related Kanji
| 懐 | pocket, feelings, heart, yearn, miss someone, become attached to, bosom, breast | 
| 古 | old |