Maseo Yamashiro

"A man cannot live by two names."

- Maseo to Oliver Queen

Maseo Yamashiro is one of the former mentors, former handlers, and a good friend of Oliver Queen. Maseo is also the husband of Tatsu Yamashiro, and the of father Akio Yamashiro.

Oliver Queen's handler
In Unthinkable, Oliver awoke in Hong Kong. Maseo walked into the room and when Oliver threatened him, Maseo showed Oliver his concealed firearms. Maseo then escorted Oliver outside, to Amanda Waller.

After Oliver made an attempt to contact his family, he stopped Oliver and brought him back to Amanda Waller. To prevent Oliver from escaping yet again, Amanda threatened to make sure Oliver never leaves or she would kill Maseo's family. A few days later, Maseo ordered Oliver to kill Tommy Merlyn, as Waller couldn't risk Tommy finding out Oliver was still alive. Maseo told Oliver it's his own fault that he had to kill his best friend as when he logged onto his email account, it set off an account alert. He and Oliver devised a plan by kidnapping Tommy and claiming to Tommy that Oliver was dead and they hacked Oliver's account in hoping a family member would come. Maseo then "rescued" Tommy from Oliver who asked Tommy to get his father to pay a ransom.

Maseo later tasked Oliver to kill a terrorist, who was actually Edward Fyers' handler who had the intel on shooting down the Ferris air jet. After Oliver had the intel, Maseo told his son not to let Oliver use his laptop though Oliver eventually persuaded his son. Maseo at first yelled at his son but Oliver would quickly take the blame. Maseo then was asked to meet with Amanda.

Abilities

 * Expert martial artist: Maseo was shown to be skilled enough to beat Oliver in hand-to-hand combat.
 * Expert marksman: Maseo was shown to be highly skilled with firearms, being able to shoot a cell phone out of Oliver's hand.

Season 2
•  "Unthinkable”

Trivia

 * In the DC comics, Maseo has a brother named Takeo.