“Under one's control” in Japanese
Short answer
Under one's control in Japanese is “手駒” (tegoma). Full meaning: (game pieces, soldiers, etc.) under one's control.
Other ways to say “Under one's control” in Japanese
手ごま
tegoma (game pieces, soldiers, etc.) under one's control
翼下
yokuka under the wing (esp. of an aircraft); under one's wing, under one's control
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