1902.
The Japanese–British alliance was signed in London on 30 January.
It was a diplomatic milestone that saw an end to Britain's splendid isolation, and removed the need for Britain to build up its navy in the Pacific.

1905.
The Japanese–British alliance was renewed and expanded.
Official diplomatic relations were upgraded, with ambassadors being exchanged for the first time.

1907.
In July, British thread company J. & P. Coats launched  Teikoku Seishi and began to thrive.

1908.
The Japan-British Society was founded in order to foster cultural and social understanding.

1909 Fushimi Sadanaru returns to Britain to convey the thanks of the Japanese government for British advice and assistance during the Russo-Japanese War.

1910.
Sadanaru represents Japan at the state funeral of Edward VII, and meets the new king George V at Buckingham Palace.

1910.
 The Japan–British Exhibition is held at Shepherd's Bush in London.
Japan made a successful effort to display its new status as a great power by emphasizing its new role as a colonial power in Asia.

1911.
The Japanese – British alliance was renewed with approval of the dominions.

1913.
The IJN Kongō, the last of the British-built warships for Japan's navy, enters service.

1914–1915.
 Japan joined World War I as Britain's ally under the terms of the alliance and captured German-occupied Tsingtao (Qingdao) in China Mainland.
They also help Australia and New Zealand capture archipelagos like the Marshall Islands and the Mariana Islands.

1915.
The Twenty-One Demands would have given Japan varying degrees of control over all of China, and would have prohibited European powers from extending their Chinese operations any further.

1917.
The Imperial Japanese Navy helps the Royal Navy and allied navies patrol the Mediterranean against Central Powers ships.

1917-1935.
Close relationships between the two country steadily worsens.

1919.
Japan proposes a racial equality clause in negotiations to form the League of Nations, calling for "making no distinction, either in law or in fact, on account of their race or nationality."
Britain, which supports the White Australia policy, cannot assent, and the proposal is rejected.

1921.
Britain indicates it will not renew the Anglo-Japanese Alliance of 1902 primarily because of opposition from the United States and also Canada.

1921.
Crown Prince Hirohito visited Britain and other Western European countries.
It was the first time that a Japanese crown prince had traveled overseas.

1921.
Arrival in September of the Sempill Mission in Japan, a British technical mission for the development of Japanese Aero-naval forces.
It provided the Japanese with flying lessons and advice on building aircraft carriers; the British aviation experts kept close watch on Japan after that.

1922.
Washington Naval Conference concluding in the Four-Power Treaty, Five-Power Treaty, and Nine-Power Treaty; major naval disarmament for 10 years with sharp reduction of Royal Navy & Imperial Navy.
The Treaties specify that the relative naval strengths of the major powers are to be UK = 5, US = 5, Japan = 3, France = 1.75, Italy = 1.75.
The powers will abide by the treaty for ten years, then begin a naval arms race.

1922.
Edward, Prince of Wales travelling on HMS Renown, arrives in Yokohama on 12 April for a four-week official visit to Japan.

1923.
The Japanese -British alliance was officially discontinued on 17 August in response to U.S. and Canadian pressure.

1930.
The London disarmament conference angers Japanese Army and Navy.
Japan's navy demanded parity with the United States and Britain, but was rejected; it maintained the existing ratios and Japan was required to scrap a capital ship.
Extremists assassinate Japan's prime minister, and the military takes more power.

1931.
September.
Japanese Army seizes control of Manchuria, which China has not controlled in decades.
It sets up a puppet government.
Britain and France effectively control the League of Nations, which issues the Lytton Report in 1932, saying that Japan had genuine grievances, but it acted illegally in seizing t
1902. The Japanese–British alliance was signed in London on 30 January. It was a diplomatic milestone that saw an end to Britain's splendid isolation, and removed the need for Britain to build up its navy in the Pacific.
1905. The Japanese–British alliance was renewed and expanded. Official diplomatic relations were upgraded, with ambassadors being exchanged for the first time.
1907. In July, British thread company J. & P. Coats launched  Teikoku Seishi and began to thrive.
1908. The Japan-British Society was founded in order to foster cultural and social understanding.
1909 Fushimi Sadanaru returns to Britain to convey the thanks of the Japanese government for British advice and assistance during the Russo-Japanese War.
1910. Sadanaru represents Japan at the state funeral of Edward VII, and meets the new king George V at Buckingham Palace.
1910.  The Japan–British Exhibition is held at Shepherd's Bush in London. Japan made a successful effort to display its new status as a great power by emphasizing its new role as a colonial power in Asia. 
1911. The Japanese – British alliance was renewed with approval of the dominions.
1913. The IJN Kongō, the last of the British-built warships for Japan's navy, enters service.
1914–1915.  Japan joined World War I as Britain's ally under the terms of the alliance and captured German-occupied Tsingtao (Qingdao) in China Mainland. They also help Australia and New Zealand capture archipelagos like the Marshall Islands and the Mariana Islands.
1915. The Twenty-One Demands would have given Japan varying degrees of control over all of China, and would have prohibited European powers from extending their Chinese operations any further.
1917. The Imperial Japanese Navy helps the Royal Navy and allied navies patrol the Mediterranean against Central Powers ships.
1917-1935. Close relationships between the two country steadily worsens. 
1919. Japan proposes a racial equality clause in negotiations to form the League of Nations, calling for "making no distinction, either in law or in fact, on account of their race or nationality." Britain, which supports the White Australia policy, cannot assent, and the proposal is rejected.
1921. Britain indicates it will not renew the Anglo-Japanese Alliance of 1902 primarily because of opposition from the United States and also Canada.
1921. Crown Prince Hirohito visited Britain and other Western European countries. It was the first time that a Japanese crown prince had traveled overseas.
1921. Arrival in September of the Sempill Mission in Japan, a British technical mission for the development of Japanese Aero-naval forces. It provided the Japanese with flying lessons and advice on building aircraft carriers; the British aviation experts kept close watch on Japan after that. 
1922. Washington Naval Conference concluding in the Four-Power Treaty, Five-Power Treaty, and Nine-Power Treaty; major naval disarmament for 10 years with sharp reduction of Royal Navy & Imperial Navy. The Treaties specify that the relative naval strengths of the major powers are to be UK = 5, US = 5, Japan = 3, France = 1.75, Italy = 1.75. The powers will abide by the treaty for ten years, then begin a naval arms race.
1922. Edward, Prince of Wales travelling on HMS Renown, arrives in Yokohama on 12 April for a four-week official visit to Japan.
1923. The Japanese -British alliance was officially discontinued on 17 August in response to U.S. and Canadian pressure.
1930. The London disarmament conference angers Japanese Army and Navy. Japan's navy demanded parity with the United States and Britain, but was rejected; it maintained the existing ratios and Japan was required to scrap a capital ship. Extremists assassinate Japan's prime minister, and the military takes more power.
1931. September. Japanese Army seizes control of Manchuria, which China has not controlled in decades. It sets up a puppet government. Britain and France effectively control the League of Nations, which issues the Lytton Report in 1932, saying that Japan had genuine grievances, but it acted illegally in seizing t
Japan–United Kingdom relations