Four hours later , the typhoon weakened into a severe tropical storm .
After crossing the Seto Inland Sea , Nangka made a second landfall on Honshu near Kurashiki , Okayama at 21 : 00 UTC .
Four hours later , the typhoon weakened into a severe tropical storm , and after crossing the Seto Inland Sea , Nangka made a second landfall on Honshu near Kurashiki , Okayama at 21 : 00 UTC .