Foreign governments were quick in inviting the sculptor for cultural visits and lectures. It was exposure to India and other parts of Southeast Asia that Castrillo was infused with the cultural skeleton of an ancient Asian culture which became his foundation upon which to challenge the pervasive influences of western art. Other government like Germany, Australia, Japan and the United States likewise hosted the sculptor.

 His ouvres toured the world, in museum and gallery exhibitions in Los Angeles, Florida, Washington, New York and Guam in the United States, Spain, Milan and Rome in Italy, Tokyo in Japan, Hongkong, International Biennales in Paris and Venice; with institutional and private collectors in these countries including Switzerland, Saudi Arabia, Poland and the Southeast Asian member countries.

 Castrillo was the subject of a number of international television documentaries and publications in Asia, Europe and the United States.

Strengthening the Roots

 Despite major offers in the United States, Castrillo decided to go back to the Philippines feeling that what he had achieved didn't carry his country and his Asian region along.

 Castrillo's vision is to celebrate the greatness of his race, as a reflection of the best that humanity can aspire to. He sees the artist's profession as that of someone whose mission is to "add to the glory of the age." His Asian nature and spirit opposed the commercial call and enticement of the west and the promise of fame and fortune, and much as his skills were internationally recognized and appreciated, he decided at a time when political turmoil existed in his country, at a time when the Filipinos were sinking themselves into oblivion as a once economically powerful Asian nation second only to Japan. A vocal voice against an oppressive Martial Law presidency, Castrillo reflected the social ills of the Marcos presidency, and for his radical statements, was jailed for a time then later placed under house arrest.

 Castrillo felt he had to heed an inner calling to bring hope and awareness back to his people. And he did this by proliferating the country with monuments of heroes that reflected the spirit of valour and national pride. These monumental sculptures meant to last a far longer lifetime than his own would bring back important moral and cultural stories and lessons for the Filipino people, the Asians and the world.