The Kaya (賀陽), Takeda (竹田), Kuni (久邇) and Higashikuni (東久邇) branches are considered among the main candidates for possible reinstatement. All are descended from the Fushiminomiya (伏見宮) branch, one of the oldest and most important collateral lines of the imperial family, which existed from the 15th century until the postwar reforms of 1947. These former branches are said to include at least 10 unmarried male descendants. A 2019 imperial family tree compiled by the Japan Innovation Party, which included former royal households, showed that many of the men now work in ordinary professions, including at trading companies, electronics manufacturers and advertising firms. Among the former branches, the Takedas (竹田) are probably the best known publicly. Tsunekazu Takeda, 78, previously served as chairman of the Japanese Olympic Committee. He later resigned after becoming the subject of a French investigation into alleged bribery linked to Tokyo's bid to host the Olympic Games. One of his sons, Tsuneyasu Takeda, is a television commentator and author who has publicly opposed another proposal aimed at maintaining the size of the imperial family — allowing female royals to retain imperial status after marriage. Tsuneyasu Takeda has argued that such a system could eventually open the way for female emperors. He has instead supported the adoption proposal for years, saying reinstating former male-line branches would preserve the traditional succession system.