Interesting.I thought it was reincarnation thing too.
When they were going to kiss,Yamada says "we're going to kiss eventually'..So I wonder how many times they've been through this.
If the killings happened in 1926 and the present time is around 1990's then it has been at least 50 years.So,does this mean they don't get to go into adulthood?
Also If this is a curse,who started it?HMMM
I can smell something cookin