A highly important estate group connected to Rear Admiral Ichiro Yokoyama of the Imperial Japanese Navy.

This lot includes his personal suitcase, an original portrait photograph, two additional original photographs, wartime documents, and a commemorative keepsake box or case associated with his service in the United States.

Rear Admiral Ichiro Yokoyama is historically significant because he was one of the Japanese naval officers who attended the surrender ceremony aboard USS Missouri on September 2, 1945.
In other words, he was present at one of the most important turning points in modern Japanese history.

What makes this group especially compelling is that Yokoyama was not only a senior naval officer, but also a man deeply connected to U.S.-Japan relations before the Pacific War. He served in the Japanese naval attaché system in the United States and was stationed in America when the war began.

The included commemorative piece is inscribed:

“Commemoration of Service in the United States at the Outbreak of the Greater East Asia War”
December, Showa 16 (1941)
Presented to Yokoyama Ichiro

This is a remarkable trace item. It directly ties the owner to the moment Japan and the United States entered war.

The suitcase is also highly evocative. It shows the initials “I.Y.” and the name “Yokoyama” written on the side, giving it strong personal identity. This is not just a period suitcase, but an object that still carries the owner’s presence.

The original portrait photograph is another highlight. The mount bears the studio mark:

“H.G. Nishio, Washington, D.C.”

That detail strongly suggests a connection to Yokoyama’s Washington period and adds further documentary value to the set.

Taken together, this is far more than a simple military grouping.
It is a rare personal archive tied to a naval officer who witnessed:

• prewar U.S.-Japan diplomacy
• the opening of the Pacific War
• Japan’s defeat and formal surrender aboard USS Missouri

Items like this — where the person is identifiable, historically important, and represented by multiple surviving objects — are exceptionally desirable for collectors of Imperial Japanese Navy history, diplomacy, and end-of-war material.

Included

• personal suitcase attributed to Ichiro Yokoyama
• original portrait photograph
• 2 additional original photographs
• wartime document(s)
• commemorative keepsake / case
• related accompanying items

Condition

All items show age, wear, stains, scratches, fading, and overall storage wear consistent with age.
The suitcase has clear use wear, surface rubbing, discoloration, and structural aging.
Photographs and papers also show age-related condition issues.
Please examine all photos carefully and judge condition for yourself. Sold as-is.

Own a Piece of History.