Welcome, busy lady!
Can anybody provide me the informations very I can found every key point?
It really depends on what exactly you want to know. Considering that the dynasty dates back around 1500 years, you´d probably better go get yourself a graduate program, if you literally need "every key point".
But maybe you´d like to make a start here
. Regarding history, there is, for example, Jerrold M. Packard´s "Sons of Heaven
: A Portrait of the Japanese Monarchy" and for the time after 1945:"The People's Emperor: Democracy and the Japanese Monarchy, 1945-1995
" (Harvard East Asian Monographs) by Kenneth J. Ruoff.
Besides, there is a lot of info to be found in the threads of this forum.