GHQ Confiscation, Repatriated Swords, and the Modern Market: Postwar Seizure, Miraculous Returns, and Appraisal Challenges

GHQ Sword Confiscation in the Immediate Post-War Period — The Scale and Course of Seizure

On September 2, 1945 (Showa 20), Japan signed the Instrument of Surrender, and the formal occupation and governance by the Supreme Commander of the Allied Powers (GHQ/SCAP) began in earnest. In September of the same year, GHQ issued an order commanding the surrender of weapons, requiring all citizens to immediately surrender all weapons and swords in their possession. Police stations and U.S. military facilities throughout the country became collection points, and swords were confiscated one after another.

The total number of confiscated swords varies by account, but according to records from the Ministry of Interior at the time and subsequent research, it is estimated to have been at least over 3 million, with higher estimates exceeding 5 million. Most met a tragic end through disposal and melting, but what became a turning point in their fate was the widespread treatment as "souvenirs." Returning American soldiers were tacitly permitted to take swords back personally, and through this unofficial "removal," countless swords crossed the Pacific. Furthermore, some fine specimens were officially confiscated and sent to U.S. military facilities and museums.

Japanese sword preservation specialists, alarmed by this outflow of cultural property, repeatedly negotiated with occupation authorities and appealed for the protection of swords with artistic and cultural value. As a result of these preservation efforts, the Japanese Art Sword Preservation Society (NBTHK) was established in February 1948 (Showa 23). Since then, NBTHK has maintained its position as an authority on sword authentication to the present day.

Swords Abroad — An Estimated 500,000 to 1 Million Sleeping Masterpieces

More than 80 years after the end of the war, Japanese swords continue to sleep scattered throughout the world. In the United States, Japanese swords began to enter the market from the 1950s to 1970s through the settlement of returning soldiers' estates and antique markets. As enthusiasts increased, Japanese swords became standard offerings at antique shows in Chicago and New York, and specialist dealers developed. Today, some experts estimate that 500,000 to 1 million Japanese swords are in circulation and held within the United States alone.

In Britain, against the backdrop of Japonisme enthusiasm since the 19th century, Bonhams and Christie's have begun to regularly hold specialized Japanese sword sales. Specialist dealers have also grown in France and Germany, with the European market forming its own ecosystem. In Australia and Canada, swords brought back by soldiers who participated in the Pacific War are still being "discovered" in closets and attics of descendants' homes.

What should not be overlooked is the existence of swords that have been long stored and forgotten in U.S. military base warehouses. In recent years, as military facilities throughout the United States organize their inventory records, cases of officially released confiscated items have been reported, and industry professionals remain vigilant.

Authentication Challenges of Returned Swords — The Triple Barrier of Rust, Signature, and Provenance

Authentication of swords that went abroad as GHQ confiscated items involves unique difficulties that differ from normal domestically circulated items. Broadly speaking, three major barriers stand in the way: "physical deterioration," "issues with signatures," and "gaps in provenance."

• Physical Deterioration and the Need for Polishing — In many cases, sword oil was not properly replenished nor were sheaths properly maintained for decades after confiscation. As a result, hamon and jihada are covered with rust and corrosion, making visual authentication impossible in many cases. Professional polishing by a togi-shi is required, though polishing is expensive and time-consuming work; only after polishing does the "true nature of the sword" become clear. Accurately assessing value before polishing itself is difficult, which is one factor that complicates sales negotiations.
• Difficulty Confirming the Signature — Among returned swords, some have only the blade removed from the tsuka when taken out, while others have nakago signatures so rusted they are difficult to read. Even more serious is the deliberate alteration or deletion of signatures. The "signature fraud" of inscribing the signature of a renowned swordsmith on an unsigned blade existed before the war, but returned swords with unclear provenance may harbor such problems, so authenticators must exercise caution.
• Gaps in Provenance — Records proving who stored the sword where and when from confiscation to the present often no longer exist. When provenance is unclear, not only is obtaining authentication certificates from NBTHK (Japanese Art Sword Preservation Society) or the Association for the Preservation of Japanese Swords difficult, but market prices are directly affected. The reality is that swords without authentication certificates see significantly reduced market valuations, even if they are fine specimens.

NBTHK and International Authentication Practices — The Process of "Reviving" Returned Swords

To legitimately circulate returned swords in the Japanese market, obtaining an NBTHK authentication certificate (designated sword, specially designated sword, etc.) is essentially a prerequisite. NBTHK holds authentication sessions several times a year, where authentication committee members examine submitted swords.

When overseas owners seek NBTHK authentication, the typical procedure is to conduct this through a domestic representative in Japan (such as a sword dealer). Temporary import of swords requires knowledge of cultural property regulations and customs procedures, making coordination with specialized transport and customs brokers essential. The entire process from polishing → authentication → obtaining certificate → re-export (or domestic circulation) often takes several months to over a year.

Meanwhile, in recent years, overseas Japanese sword societies such as the "Token Society of America" (now Japanese Sword Society of the United States) have been conducting their own study sessions and authentication seminars, and the number of knowledgeable collectors is increasing. Cases where these enthusiasts "discover" high-quality returned swords and bring them in for NBTHK authentication are on the rise.

Return Routes and Market Value — High-Value Auctions from "Miraculous Returns"

In recent years, there are three main routes through which swords that went abroad "return" to Japan.

1. The most common is via overseas auctions. Post-war swords are offered at high frequency in Japanese art sales regularly held by Sotheby's and Bonhams' London and New York branches. Cases where Japanese sword dealers and individual collectors win bids online and import them after customs procedures are increasing annually. Since the 2010s, the combination of exchange rate fluctuations and increased interest in Japanese culture among Western wealthy collectors has led to rising auction prices.
2. Next is the direct negotiation and donation route. This involves cases where descendants of former soldiers in the United States and Britain search for a home for "grandfather's memento sword" discovered in a shed or warehouse. Inquiries have been brought to Japanese embassies and consulates, and multiple cases of donations to the Yasukuni Shrine Yushukan or the Sword Museum (Sumida Ward) have been reported. When the owner expresses a desire to "return it to Japan," donations or sales can be completed with appropriate cultural property evaluation.
3. Intergovernmental and inter-institutional negotiations are few in number but include important cases of diplomatic significance. For important cultural property-class swords located abroad that are known to the Agency for Cultural Affairs, cases of return negotiations through the Foreign Ministry have existed in the past.

The market value of returned swords ranges widely from tens of thousands to tens of millions of yen, depending on the combination of condition, provenance, swordsmith signature, and era. In particular, old swords from before the Shinto period that are certified as fine specimens after polishing and obtaining authentication certificates can receive valuations equal to or higher than domestic circulation items. The industry still views the "potential of returned swords" as high, and increased inquiries from overseas are stimulating the overall market.

The Perspective of Sword Culture Succession — Facing the History of Confiscation

The sword confiscation by GHQ brought about a cultural rupture that went beyond mere weapon disposal. With hundreds of thousands of swords destroyed or lost, countless examples exist of "family-passed-down swords" and "regional masterpiece swords" that should have been passed on being lost forever. This historical fact is deeply inscribed in the structure of today's sword market.

On the other hand, the increase in returned swords also suggests new possibilities. When a sword that has long slept overseas undergoes polishing and authentication and is "revived" and passed on to those who carry forward Japanese sword culture, there is a quiet recovery that transcends the history of pillage. It could be said that the skills of sword authenticators and togi-shi make possible the revival of cultural property across eras.

Those involved in returned swords — buyers, sellers, and authenticators — are required to have not only authentication expertise and specialized knowledge, but also a deep understanding of this historical context. This leads to true succession of Japanese sword culture that goes beyond mere "antique dealing."