Technology and philosophy

Monday, June 29, 2026

Editorial: Why Male-Line Emperors Are Harming Japan’s Imperial Future

Efforts have progressed towards amending Japan's Imperial Household Law for the first time since the adoption of the present constitution, aiming to ensure the continued operations of the imperial family. However, the core issue—establishing a clear route for secure imperial succession—has remained unresolved.

A suggestion for dietary improvements aimed at ensuring sufficient members within the Imperial Family has been developed. The majority of political parties have endorsed a strategy allowing female descendants of the Imperial Family, such as Princess Aiko, who is 24 years old and the child of Emperor Naruhito and Empress Masako, to maintain their titles following marriage. Additionally, this approach includes provisions enabling males from previous branches of the imperial family to be adopted into the Imperial Family. However, the Constitutional Democratic Party of Japan, which serves as the primary opposition group in the House of Councillors, rejected the idea of adoptions.

According to the Imperial Household Act, a woman within the royal family who weds someone not part of the dynasty forfeits her imperial title. Among the six single individuals in the Royal Family belonging to generations below the current emperor, five are females. The only male among them is Prince Hisahito, the 19-year-old firstborn son of Crown Prince Akishino and Crown Princess Kiko. Without intervention, this trend will continue unchecked, leading to further reduction in their ranks.

It is appropriate to honor the desires of the women within the Imperial Family and let them decide if they wish to stay part of the family. Both the governing and opposition parties largely concur on this matter. As this issue significantly impacts the personal lives of female members of the imperial household, it must be implemented as soon as possible.

The question of whether the husbands and children of women in the imperial family should also be included in the imperial lineage was central to discussions, but an agreement remains postponed at this time. This is due to concerns from the governing Liberal Democratic Party (LDP) and others that granting membership to these individuals might result in an emperor descending through the maternal line.

However, some argue that if spouses and offspring continue to be regular citizens, enjoying constitutional rights to participate in politics and economics, there is a possibility the Imperial Family might be taken advantage of. The present-day Imperial Family performs its official responsibilities as a unified family, making it reasonable for husbands and children to also be part of this familial structure.

At the same time, it raises concerns that the proposal to include adoptive individuals who have a paternal lineage tracing back to an emperor as part of the imperial family was approved.

The people in question would be descendants of the 11 former branch houses that left the Imperial Family about 80 years ago. It is doubtful that the public would accept, as objects of respect, people who were born and raised as ordinary citizens. Some also argue that this would amount to discrimination based on family lineage, which is prohibited by Article 14 of the Constitution. Tracing the male line, their blood relationship to the current Imperial Family is distant, and one would have to go back as far as the Muromachi period (approx. 1336-1573).

According to an opinion survey conducted by Mainichi Shimbun in May, 63% favored permitting women from the Imperial Family to keep their titles, whereas backing for the adoption proposal stood at just 36%.

Article 1 of the Constitution indicates that the Emperor's role comes from "the will of the people." The LDP along with its allied party Nippon Ishin (known as the Japan Innovation Party, or JIP), clearly mentioned in their joint agreement that implementing this plan was their main focus; however, this does not truly reflect the will of the general population.

Firstly, the proposal to include males from previous branch families into the imperial family was not included in the 2005 report prepared by an expert committee during the Junichiro Koizumi government. This decision was made due to concerns regarding public comprehension and acceptance, as well as issues related to stability and traditional practices. In order to maintain the current structure, the committee supported the possibility of having female and maternal-line emperors.

Approximately half of Japan's former emperors had mothers who were consorts, yet this practice does not align with modern societal values. So long as there remains a strong commitment to preserving the paternal lineage, women joining the imperial family will face significant expectations to bear a son. Maintaining such a structure would prove very challenging.

With the progress of women within society and increasing examination of gender-based roles, societal values have evolved. The Emperor’s position as a symbolic figure is upheld not solely through tradition and lineage, but also due to the public's comprehension and empathy.

Following World War II, the imperial family has adapted well to changing societal circumstances, such as accepting wives from common people.

According to a Mainichi survey, 72% of people support having a female emperor. If the issue of permitting female rulers and those from the maternal line isn't addressed, the system could face an impasse, both structurally and regarding societal perception.

Nevertheless, House of Representatives Speaker Eisuke Mori stated during a press briefing on June 8 that if a boy was born to an adoptive family member, he would be eligible to inherit the throne. This statement contrasted with the Diet's proposed plan, which sought widespread consensus, revealing the LDP's genuine commitment to maintaining the male lineage.

After the specific legislation for amending the Imperial Household Act and enabling the resignation of current Emperor Emeritus Akihito came into effect in 2017, a joint resolution approved by both the governing party and the main opposition urged the administration to explore methods for securing consistent imperial succession and establishing branches headed by women within the royal family. However, the 2021 report from the government’s advisory committee suddenly introduced an adoption proposal without addressing the core issue of succession.

The present Diet plan is merely an improvised solution aimed at maintaining the size of the Imperial Family, and it fails to address the key problem directly. A fresh group of specialists needs to be formed, and the discussion should begin anew with greater depth.

The present imperial household has aimed to remain "close to the people," which has garnered backing. However, should the family move excessively away from public awareness due to intense endeavors to preserve the custom of male-only inheritance, it would lose its legitimacy as the "emblem of the nation and the representation of national unity."

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