This episode's headline: Irreconcilable Differences; Culture Clash; Update - Whose Navy?. The guests include AYAKO DOI, Japan Digest; MASAMICHI HANABUSA, Consul General, New York; JAMES FALLOWS, Atlantic Monthly; PAUL VOLCKER, Former Chairman, Federal Reserve; CORRESPONDENTS: NIK GLASS; PAUL SOLMAN. Byline: In New York: ROBERT MacNeil; In Washington: JAMES LEHRER