When memories popped into my mind, I sometimes have a feeling that they pass through me. The feeling of nostalgia at that moment will disappear in an instant, and I can barely commit the after effect of that to memory. Apparently I therefore have been confused with what the sense, when recalled, is more precious than the memory which triggered the one of nostalgia. At the same time, my loging that I will identify the all conditions around me at that time, such as nature, my body or mind to reproduce nostalgia for itself grows stronger by the moment.