NHK has learned that Prime Minister Kishida Fumio is arranging to appoint former Defense Minister Nakatani Gen as his special advisor on human rights issues.
Nakatani, a 64-year-old Lower House member, co-chairs a non-partisan parliamentarian group on China's Xinjiang Uygur Autonomous Region.
His appointment is expected on Wednesday, when Kishida plans to launch his second Cabinet.
Kishida pledged in September to create the post during his campaign for the main governing Liberal Democratic Party's leadership election.
Analysts say Kishida hopes Nakatani's appointment will demonstrate his active stance on human rights issues.