Japan and Germany "winning" is essentially impossible. I'll try to construct the most plausible scenario that retains as much of real history as possible:
Japan manages to contain the Kwantung Army and prevents it from launching its full-scale invasion of China in 1937. Japan remains a highly militarized state and continues to occupy Manchuria and Korea, while also occupying French Indochina in 1940 following the German victory in France. Tensions remain strong between Japan on one hand and the United States, United Kingdom, Dutch East Indies, and China on the other. (This turn of events is highly implausible, but is the only way for Japan to "win" World War II - they simply have to avoid it, because Japan cannot defeat the United States - that is utterly impossible).
A collapse of the Soviet government in September 1941, in the face of the German invasion, destroys the USSR's ability to coordinate resistance to the German occupiers and leads to the fall of both Leningrad and Moscow in November. German troops spend most of the winter consolidating their gains and preparing for a potential Soviet counterattack - however, Soviet attacks are piecemeal and uncoordinated, and accomplish nothing. Germany prepares another offensive for summer 1942, aimed at pushing the remaining organized Soviet forces beyond the Urals and eliminating the pockets of Soviet resistance in the occupied USSR. This offensive is successful, and the Germans have effectively defeated the Soviet Union. However, a medium-intensity war continues off and on, requiring three million German troops to occupy European Russia and causing thousands of casualties to the Germans every year, while over the next decade, a third of the Russian population is killed and another third is sent into slavery in Germany as an expendable labor force.
With "victory" in the Soviet Union, Germany consolidates its control over the continent, putting more resources into air defense and building a strong garrison in France and in Italy. The UK and USA (having declared war on Germany in April 1942) defeat Italy and the Afrika Korps in Northern Africa, and successfully land in Italy, but German troops hold the Allies in a line around Monte Cassino. Casualties on both sides are heavy.
An abortive Anglo-American attack on France while the USSR collapses fails in 1942, with heavy losses - this was a move of desperation, rather than a well-planned invasion, and significant American troops have not yet arrived in theater. A second invasion is planned, but is postponed until 1945. With the stalemate in Italy, the strong German garrison in France, and the lack of air supremacy over France, the Allies once again postpone the invasion until 1946, but with little change, the Allies postpone "indefinately."
A stalemate ensues, with Britain heavily militarized but free and supported by the United States, while a "free" southern Italy is defended along the most heavily-militarized border in the world. The United States and United Kingdom maintain a very large military presence in the Pacific, to deter Japan. Both countries supply the rump USSR through Vladivostok, but they can only provide so much aid. Germany is free to devastate the continent.
This state of affairs can only last so long, though, before Germany decides to escalate matters. This will eventually end in the nuclear devastation of Germany, with perhaps 100 million more dead across Europe to German extermination squads and the eventual Allied invasion before the last bombs fall. The world is significantly poorer as a result of Europe's devastation. War between Japan and the US is still probably unavoidable in the long term, and Japan will lose. The US will also be poorer and unhappier, with a permanent draft and greater militarization, as well as a willingness to use nuclear weapons as a standard part of war (having done so in the final defeat of Germany, alongside the British). European cultural treasures are effectively destroyed - there will not be an Eiffel Tower or Mona Lisa or Brandenberg Gate or possibly even the Colosseum of Rome in 1970.
Fortunately, this scenario is highly implausible. Germany was outclassed during World War II, particular from 1942, when they were at war with the three most powerful countries in the world at once. Japan was always outclassed as well - they never had a chance against the United States.