Definition of 懐旧 (かいきゅう)
かいきゅう
                        懐旧
かいきゅう
kaikyuu
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 | 
| 旧 | old times, old things, old friend, former, ex- |