Marcos Jr's links to his father, whose rule was marked by the bloody repression of the martial law years, have made him one of the nation's most polarizing politicians.
He has benefited from a deluge of misinformation on social media targeting a largely young electorate with no memory of the corruption, killings, and other abuses committed during the elder Marcos's 20-year rule.
Also read: Philippines: Marcos Jr. Wins Presidential Election Landslide
His campaign was bolstered by teaming up with Sara Duterte -- who won even more votes than Marcos to easily secure the vice presidency -- as well as the backing of other political elites.
Marcos Jr and Duterte's shared history as the offspring of authoritarian leaders has alarmed rights groups and many in the clergy, who fear they will use their victory to entrench themselves in power.
Praising his father
Marcos Jr was at boarding school in Britain in 1972 when his father declared martial law, unleashing large-scale corruption and a bloody crackdown on dissent.
He has defended his father's rule by citing the initial surge of economic growth and government spending under martial law, which he said was necessary to save the country from communist and Muslim insurgencies.
On Thursday he praised his father's rule, saying: "I once knew a man who saw what little had been achieved since independence... but he got it done."
After the fallen dictator's death in Hawaii in 1989, the Marcoses returned home and began their clan's revival, getting elected to a succession of positions of power.
The family's turnaround has been aided by public disenchantment over an enduring gulf between rich and poor, and graft allegations that marred post-Marcos administrations.
Seeking to avoid a repeat of the 2016 campaign when he was hounded by questions about his family's past, Marcos Jr this time snubbed debates with rivals and gave few interviews.
Opponents have tried in vain to have Marcos Jr disqualified from the presidential race over a previous tax conviction. They appealed to the Supreme Court but lost just days before he took office.
Also read: Philippines: Sara Duterte Sworn in as Vice President after Emphatic Election Victory
They also accused him of exaggerating his educational qualifications, and the family of failing to pay nearly $4 billion in estate taxes.
Until recently, outgoing president Duterte was a supporter of Marcos Jr.
But although his party endorsed Marcos for president, Duterte called him a "weak" leader.
This fueled speculation that Duterte, who faces an international probe into his deadly drug war, was trying to secure assurances from Marcos Jr for when he is out of office.
Source: Agence France-Presse
Simak breaking news dan berita pilihan kami langsung di ponselmu. Pilih saluran andalanmu akses berita Kompas.com WhatsApp Channel : https://www.whatsapp.com/channel/0029VaFPbedBPzjZrk13HO3D. Pastikan kamu sudah install aplikasi WhatsApp ya.