I already made a thread for Japan's golden week kek
Anyway, Akihito was a relatively passive emperor; some say he's abdicating because Shinzo Abe is pushing for a re-militarized Japan which he doesn't want a part of.
Regardless, a significant part of MacArthur's deal with Japan was for Hirohito to renounce his divinity--Akihito is following in his father's footsteps by abdicating and following that general theme.
A lot of people still take the Imperial family very seriously; far more than say Brits would with their queen. Just yesterday a possible assassination attempt on poor 12 year old prince Hasahito while he was in school -- in an attempt to end the royal line.