During the German occupation, he was chief editor for La voix de France and inspector general of radio for the Vichy government, for which he was sentenced in absentia to life imprisonment with penal labor.
Left France in 1944 and sought asylum in Italy, in April 1945 at the Vittoriale degli italiani (in Gardone Riviera, Lombardy) and then in Rome; remained in Roman exile until his death; named chancellor of the Imperial Embassy of Iran to the Holy See.
In 1950 he published a collection of 55 haïkaïses and tankas, In morte di un Samurai, in memory of the general Hideki Tojo, executed for hanging on 23 December 1948.
Maurice Delage composed a work for baritone and chamber orchestra based on Pascal's In morte di un Samurai.
[2] Pascal made a French translation – «a work of philological reconstruction» in the personal view of Mario Praz[3] of the Quatrains by Omar Khayyam .