A VISIT TO JAPAN PLANNED BY NIXON
Pres Nixon and Japanese Premier Tanaka agree that Nixon will visit Japan within next 18 mos and Emperor Hirohito will come to US in '74, announcement after July 31 White House meeting; exch of visits is intended to improve relationship between 2 countries, which has been damaged by econ issues over last 2 yrs; both visits are expected to arouse controversy in Japan; Nixon would become 1st incumbent US Pres to visit Japan and Hirohito 1st Japanese sovereign to pay official call on US; Sec Rogers and Japanese Min M Ohira conf on energy crisis, reconstruction of Indochina and forthcoming UN debate on Korea; Tanaka, Nixon and honor guard illus