Trump's hiking tariffs on Japanese and Korean goods to 25% from August 1.  
This kicks off unilateral tariffs on countries without US trade deals.  
Japan and Korea are first targets in his push for trade reforms.  
Businesses struggle to gauge impacts on production, hiring, and inflation.  
Originally 24% and 25%, tariffs dropped to 10% for 90-day talks.  
Now they're back up, adding uncertainty to markets and planning.

Wow, this bold move by Trump could really shake things up and spark some exciting changes in global trade dynamics