	senior u s official to visit japan as  row grows undersecretary of state michael armacost will visit tokyo next week for meetings with high level officials that will include discussions of a growing  row over japanese semiconductor electronics products he is the first high level u s official to visit japan since president reagan announced last week plans to impose tariffs worth up to mln dls on japanese electronic goods on april in retaliation for tokyo s alleged failure to live up to a pact on microchip  signed last september the trip is set for april the state department said reuter 
