Ok, here are some help:
Claimants to the French throne:
Orleanists:
Prince Philippe, duke of Orleans (1869-1926) claimant from 1894
Prince Jean, duke of Guise (1874-1940) claimant from 1926
Henri, count of Paris (1908-1999) claimant from 1926
Henri d'Orleans, count of Paris (1933-) claimant from 1999
Legitimists: (Bourbons)
Infante Alfonso Carlos, Duke of San Jaime (1849-1936), Carlist claimant to the throne of Spain, Legitimist claimant to France under the name Charles XII
Jaime, duke of Madrid (1870-1931), Carlist claimant in Spain, Legitimist claimant in France under the name Jacques I
Infante Jaime of Spain, Duke of Segovia (1908-1975), son of king Alfonso XIII of Spain, French legitimist claimant under the name Henri VI
Alfonso, duke of Cadiz and Anjou (1936-1989) grandson of Alfonso XIII of Spain, French claimant under the name Alphonse de Bourbon
Bonapartists:
Victor, Prince Napoleon (Napoleon V) 1862-1926
Louis, Prince Napoleon (Napoleon VI) 1914-1997
Japan:
OTL Emperor Hirohito (the Showa emperor), reigned 1926-1989. so if nothing unusual had happened he should be emperor.
Claimants to the French throne:
Orleanists:
Prince Philippe, duke of Orleans (1869-1926) claimant from 1894
Prince Jean, duke of Guise (1874-1940) claimant from 1926
Henri, count of Paris (1908-1999) claimant from 1926
Henri d'Orleans, count of Paris (1933-) claimant from 1999
Legitimists: (Bourbons)
Infante Alfonso Carlos, Duke of San Jaime (1849-1936), Carlist claimant to the throne of Spain, Legitimist claimant to France under the name Charles XII
Jaime, duke of Madrid (1870-1931), Carlist claimant in Spain, Legitimist claimant in France under the name Jacques I
Infante Jaime of Spain, Duke of Segovia (1908-1975), son of king Alfonso XIII of Spain, French legitimist claimant under the name Henri VI
Alfonso, duke of Cadiz and Anjou (1936-1989) grandson of Alfonso XIII of Spain, French claimant under the name Alphonse de Bourbon
Bonapartists:
Victor, Prince Napoleon (Napoleon V) 1862-1926
Louis, Prince Napoleon (Napoleon VI) 1914-1997
Japan:
OTL Emperor Hirohito (the Showa emperor), reigned 1926-1989. so if nothing unusual had happened he should be emperor.