ambassador

"Roland Sletor Morris (1874 – 1945) was a U.S. diplomat and politician. He was the American ambassador to Japan from 1917 to 1920." en.wikipedia.org/wiki/Roland_Sletor_Morris

gorgeous

"V.K. Wellington Koo (29 January 1887 – 14 November 1985), also known as Koo Vi Kyuin, Ku Wei-chün and Gu Weijun, was a prominent Chinese diplomat from the Republic of China. He was one of China's representatives at the Paris Peace Conference of 1919; served as an Ambassador to France, Great Britain and the United States; was a participant in the founding of the League of Nations and the United Nations; sat as a judge on the International Court of Justice in The Hague from 1957 to 1967. Between October 1926 and June 1927, while serving as Minister of Foreign Affairs, Koo briefly held the concurrent positions of acting Premier and interim President of the Republic of China. Koo is the first and only Chinese head of state known to use a Western name publicly."
en.wikipedia.org/wiki/Wellington_Koo
c250.columbia.edu/c250_celebrates/remarkable_columbians/v...

This is the second of his (eventually) four wives:
"Koo's second wife, Tang Pao-yu "May" (simplified Chinese: 唐宝玥; traditional Chinese: 唐寶玥; pinyin: Táng Bǎoyuè; c. 1895–1918), was the youngest daughter of the former Chinese prime minister Tang Shaoyi and a first cousin of the painter and actress Mai-Mai Sze. Their marriage took place soon after Koo's return to China in 1912. She died in an influenza epidemic in 1918. They had two children: a son, Teh-chang Koo (1916–1998, a.k.a. Wellington Koo, Jr.), and a daughter, Patricia Koo (b. 1918)."

The picture appears to be from the same event pictured in a November 29, 1915 newspaper account of the arrival from Europe of Mr. and Mrs. Koo:
"Dr. V. K. Wellington Koo, the new Chinese Minister to the United States, arrived yesterday on the American liner New York from Liverpool."
fultonhistory.com/Newspaper%2018/New%20York%20NY%20Press/...
See also

George Wilkins Guthrie (September 5, 1848 – March 8, 1917) was the United States Ambassador to Japan from August 7, 1913 until his death on March 8, 1917. He was Mayor of Pittsburgh before.
en.wikipedia.org/wiki/George_W._Guthrie
en.wikipedia.org/wiki/United_States_Ambassador_to_Japan

See also photo in The Washington herald., November 22, 1914, Page 14

Guthrie is also on this Bain Photograph, dated January 5, 1916:

See comments there

His wife was the former Florence J. Howe.
news.google.com/newspapers?id=2DobAAAAIBAJ&sjid=B00EA...

Thanks to you both for your research. We'll add some of this information to the record the next time we update.

This photo appeared in The Sunday Oregonian, March 26, 1916, SECTION FIVE, Image 71 with the caption:
"George W. Guthrie, the United States Ambassador to Japan, calls frequently on the Emperor. The automobile has not yet replaced the state coach in Japan, though there are many "devil wagons" in use there."
oregonnews.uoregon.edu/lccn/sn83045782/1916-03-26/ed-1/se...