1940 to SS Carreta via US Pacific Airmail Service, US Armed Guard

1940 Whitemouth, Ma (OC 29 40) to SS Carreta c/o Mitsui Bassan Jaisha Lt, via US Pacific Airmail Service, Osaka, Japan, censor tape, Japanese censor, five 6c stamps originally on cover (one on front, four on reverse), two removed by censor? The addressee served in the US Armed Guard aboard merchant marines.