Here's a quick map based on one of my earliest alternate history ideas. The premise in this case being that:
a) Spain actually gave more effort into its distant colonies (i.e. the Philippines/Las Islas Filipinas) fairly early on, and
b) Legaspi and his conquistadores not only survived tropical diseases, but also decided to set their sights north of Manila, towards the Land of the Rising Sun.
Fast forward a couple centuries to 1850, and the Viceroyalty is a showcase of Spanish and Catholic power and influence in the Far East...if you're a Peninsulares, Insulares, Mestizo or Fraile, in any case. To say that the Japanese in and out of the colony are discontent is more than just an understatement.
In case you're wondering, 大日本帝国 means "Empire of Japan," the Emperor and Shogun having settled towards a (fragile) power-sharing deal in Edo.