Thank you for your help.
I checked my QSO data, but I do not see time, and do not know where I can see it. But it does not matter much as far as the reference are corrected.
However, the first record for YO9IJP should be deleted, according to JA7GAX. He wrote this call down just for his note, and he did not have a real contact with this station.
My apology to have bothered you many times.