|Preceded by||Koalisyon ng Daang Matuwid|
|Coalition members||Liberal Party|
|Slogan||Makinig. Matuto. Kumilos.|
Otso Diretso (transl. Straight Eight) is an electoral alliance of political parties in the Philippines in the 2019 Philippine general elections that are in opposition to President Rodrigo Duterte. It is a slate of eight candidates (otso translates as eight) for the Philippine Senate. Twelve senators will be elected in 2019, half of the 24 member senate. Senators are elected in a single, multiple-candidate district encompassing the entire country.
The alliance believes that the 2019 midterm elections will be a "referendum" on Duterte's government.  The coalition hopes to build a new political culture based on political leaders practicing "makinig, matuto, kumilos" (Tagalog for "listen, learn, take action"), with each candidate emphasizing the need for government to listen to its citizens.
The coalition's platforms and policies are based on Project Makinig, a nationwide listening campaign conducted by 9,800 volunteers that generated 118,000 conversations. Project Makinig aimed to find out the issues most relevant to Filipino voters, to form the basis for the messaging, strategy, and platform of the coalition.
Otso Diretso's eight-point political platform includes "poverty alleviation, a more robust economy with more jobs and lower prices of goods, a peaceful home and nation for the benefit of Filipino children, improved education and free college tuition that will lead to jobs, fair wages and profit for laborers, farmers, and fishermen, expanded rights for senior citizens and PWDs, national security, and judicial reform."
|Candidate||Party||Last position in government||Relatives in government||Elected|
|Gary Alejano||Representative, 2013-current|
|Bam Aquino||Senator, 2013-current, up for reelection||former Senator Benigno Aquino, Jr. (uncle), former President Corazon Aquino (aunt), former President Benigno Aquino III (cousin)|
|Chel Diokno||none (founding Dean De La Salle University College of Law, chairman Free Legal Assistance Group)||Senator Jose Diokno (father), former National Historical Commission of the Philippine Chairman Maria Serena Diokno (sister)|
|Samira Gutoc||former member of the Bangsamoro Transition Commission||none|
|Florin Hilbay||Solicitor General, 2014-16|
|Romulo Macalintal||none (lawyer)|
|Mar Roxas||Senator, 2004-10; Secretary of Trade and Industry, 2000-03; Secretary of Transportation and Communications 2011-12; Secretary of the Interior and Local Government, 2012-15||President Manuel Roxas (grandfather), Senator Gerry Roxas (father)|
|Erin Tañada||Representative 2004-13||Senator Lorenzo Tañada (grandfather), Senator Wigberto Tañada (father)|
- "Robredo leads intro of 'Oposisyon Koalisyon' Senate bets". philstar.com. Retrieved 2018-12-11.
- "Opposition completes 8-member senatorial slate for 2019 polls | Inquirer News". newsinfo.inquirer.net. Retrieved 2018-12-11.
- Jr, DJ Yap, Nestor P. Burgos. "Opposition: May elections a referendum on Duterte". newsinfo.inquirer.net. Retrieved 2019-02-17.
- "A verdict on Duterte: looming midterms are a referendum on president". Nikkei Asian Review. Retrieved 2019-02-27.
- News, ABS-CBN. "Opposition is 'alive': VP Robredo launches Senate ticket". ABS-CBN News. Retrieved 2019-02-17.
- "Otso Diretso". volunteer.otsodiretso.ph. Retrieved 2019-02-17.
- "FILIPINOS CROSS DIFFERENCES IN GENUINE SHARING OF STORIES THROUGH PROJECT MAKINIG". Liberal Party of the Philippines. 2018-11-26. Retrieved 2019-02-17.
- "Otso Diretso! Sa Senado! | Ipaglaban ang Ating Bukas, Boto mo ang Lunas". www.otsodiretso.ph. Retrieved 2019-02-17.
- Roxas, Pathricia Ann (February 11, 2019). "Pangilinan: Otso Diretso to focus on easing Filipino lives". Philippine Daily Inquirer. Retrieved April 18, 2019.
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