Keicho Embassy Documents: A 400-Year Journey Across Two Oceans

In 1613, a Japanese samurai named Hasekura Tsunenaga embarked on an extraordinary seven-year diplomatic mission that would make him the first Japanese ambassador to cross both the Pacific and Atlantic oceans. Today, the 47 precious artifacts he brought back from this historic journey are preserved as National Treasures at the Sendai City Museum, recognized by UNESCO as Memory of the World heritage for their testament to early East-West cultural exchange.

The Historic Mission That Changed World Perception

The Keicho Embassy represents one of the most ambitious diplomatic undertakings of the early 17th century. Commissioned by Date Masamune, the powerful lord of Sendai, this mission aimed to establish direct trade relations with Mexico and secure Catholic missionaries for northern Japan. The delegation of 180 people, including Japanese samurai, merchants, and Spanish guides, departed from Tsukinoura Bay (present-day Ishinomaki City) aboard the galleon San Juan Bautista, a ship built in just 45 days using both Japanese craftsmanship and European naval technology.

What makes this mission particularly remarkable is its timing - it occurred during Japan's transition toward isolation, making it the last major diplomatic exchange before the country closed its doors for over 200 years. The artifacts from this journey thus represent a unique window into a brief but significant moment when Japan actively sought to engage with the wider world.

Why These Documents Became National Treasures

In 2001, the Keicho Embassy materials became Japan's first historical documents to be designated as National Treasures, a recognition of their exceptional cultural and historical value. These artifacts provide irreplaceable evidence of early modern Japan's diplomatic sophistication and cultural exchange capabilities. The collection demonstrates that Japan was not merely a passive recipient of Western influence but an active participant in global diplomacy during the Age of Discovery.

The designation particularly recognizes three aspects of significance: their rarity as the only complete set of materials from a Japanese embassy to Europe in the early modern period; their artistic value, including Japan's oldest existing oil portrait of a Japanese person; and their historical importance in documenting Japan's brief but intense period of Christian influence and international engagement before the implementation of sakoku (national isolation) policy.

In 2013, these materials achieved further international recognition when they were inscribed in UNESCO's Memory of the World Register, acknowledging their global significance in documenting early intercultural dialogue and diplomatic relations between East and West.

Highlights of the Collection

The crown jewel of the collection is Hasekura Tsunenaga's portrait, painted in Rome around 1615. This oil painting depicts the samurai diplomat in European-style black clothing, holding a rosary while praying before a crucifix, representing the oldest surviving oil portrait of a Japanese person painted from life. The painting's existence in Japan is particularly precious as it survived the subsequent persecution of Christianity and destruction of Christian artifacts.

Equally significant is the Roman Citizenship Certificate, an ornate document on parchment written in gold ink with Latin text. This certificate not only granted Hasekura citizenship of Rome but also elevated him to noble status - an extraordinary honor for a foreign visitor. The document features seven colorful coats of arms, including Hasekura's family crest alongside Rome's emblem, and mentions "Idate Masamune," "Woshu" (Oshu/Northern Japan), and "Sendai" in the text.

The collection also includes a portrait of Pope Paul V, whom Hasekura met on November 3, 1615, in a grand ceremony at St. Peter's Palace. Additionally, there are 19 pieces of Christian religious art and liturgical items, and 25 pieces of textiles and equestrian equipment, all representing the material culture exchanged during this historic diplomatic encounter.

Visiting the Keicho Embassy Documents

The Sendai City Museum houses these National Treasures in a specially designed exhibition space that provides both preservation and visibility. The museum rotates the display of the 47 items to ensure their conservation while maintaining public access to this remarkable collection. The permanent exhibition tells the complete story of the embassy through carefully curated displays, supplemented by detailed explanations in English.

The museum offers free English audio guides with admission, providing in-depth commentary on the embassy's journey, the political context of the mission, and the significance of each artifact. Special exhibitions featuring all 47 items simultaneously occur periodically, often commemorating anniversaries of the embassy's departure or return.

Photography restrictions apply to protect these light-sensitive documents, but the museum shop offers high-quality reproductions and detailed catalogs for those wanting to study the artifacts in detail. The museum also features interactive displays and video presentations that bring the 400-year-old story to life for modern visitors.

Access and Practical Information

Sendai City Museum is conveniently located on the former site of Sendai Castle's third bailey, surrounded by the natural beauty of Aobayama. The museum is an 8-minute walk from International Center Station on the Sendai Subway Tozai Line, making it easily accessible from Sendai Station in about 15 minutes total travel time.

For those preferring bus travel, the Loople Sendai tourist bus provides direct service from Sendai Station, with the museum stop (Stop 5: Museum/International Center) taking approximately 20 minutes. The Loople bus day pass also provides discounts on museum admission.

Admission fees are remarkably affordable at 460 yen for adults, 230 yen for high school students, and 110 yen for elementary and junior high school students. The museum is open from 9:00 AM to 4:45 PM (last entry at 4:15 PM), closed on Mondays (except national holidays), the day after national holidays, and during the New Year period (December 28 to January 4).

Nearby Attractions and Experiences

After viewing the Keicho Embassy documents, visitors can explore the adjacent Sendai Castle ruins, where Date Masamune once planned this ambitious mission. The castle site offers panoramic views of Sendai city and houses a statue of Date Masamune, the visionary daimyo who initiated the embassy.

The nearby Zuihoden Mausoleum, Date Masamune's ornate final resting place, provides further context about the powerful lord who dared to engage with the Western world. The mausoleum's elaborate architecture and peaceful forest setting offer a contemplative conclusion to understanding this historical period.

For those interested in the maritime aspect of the embassy, the Sant Juan Bautista Museum in Ishinomaki (about an hour from Sendai) features a full-scale replica of the galleon that carried the embassy across the Pacific. The museum provides an immersive experience of the voyage conditions and naval technology of the era.

Within walking distance of the museum, the Sendai International Center often hosts cultural events and exhibitions that complement the museum experience. The center's location along the Hirose River provides pleasant walking paths for reflection after absorbing the weight of this historical narrative.